Tunable PowerArc™ Illuminator


OBB Tunable Light Source

  • Need a high intensity CW laser that is tunable from 250 to 1,000 nm? yes

  • Need it to deliver milliwatts of energy? yes

  • Need it to be portable and so simple that anyone can operate it? yes

If this sounds like the light source you need, then OBB has the answer. The Tunable PowerArc™ Illuminator provides all of these benefits, it just isn’t a laser.

Overview

Tunable PowerArc™ Illuminator

Tunable PowerArc

Tunable PowerArc™ Illuminator equipped with 75 watt xenon lamp and 1,200 l/mm x 750 nm blazed grating. Here the adjustable bandpass was set to 10 nm.

Think of the OBB Tunable PowerArc™ Illuminator as a continuously tunable high intensity laser. It can produce tunable monochromatic light with hundreds of milliwatts of power, and an overall available spectral output from 180 nm to 24 microns.

Key Benefits of the OBB Tunable PowerArc™ Illuminator

  • Continuously tunable from 180 nm to 24 microns
  • Continuously adjustable bandpass from 0 to 200 nm
  • Milliwatts of energy
  • Push button start and simple dial the wavelength tunability
  • No ozone venting required
  • An Illuminator that is so easy to use, anyone can use it
  • Compact and portable

Need More Power?

If you need even more power in a tunable light source then we also offer a Tunable KiloArc™ Illuminator. It delivers hundreds of milliwatts of power for about twice the price of the Tunable PowerArc™ Illuminator. For more information go to Tunable KiloArc™ Illuminator.

 

Hardware

Consisting of a unique arc lamp housing tightly coupled to a 0.2 meter monochromator, the Tunable PowerArc™ Illuminator is a self aligned illuminator that generates milliwatts of intensity and offers the versatility of continuous wavelength and bandwidth selection. The wavelength can be set manually or, for ultimate flexibility, it can be scanned under computer control. The Tunable PowerArc™ Illuminator could not be easier to operate. The system requires no ozone venting, and with the 75 watt xenon lamp no cooling is required. Simply push the start button and dial the wavelength and bandpass of output that you require. It’s that easy!

Arc Lamp Hardware

 

Lamp Housing

At the heart of the OBB PowerArc™ lamp housing is a proprietary on-axis ellipsoidal reflector. Our reflectors collect up to 70% of the radiant energy from the arc lamp, versus only 12% for typical condenser systems in vertical lamp housings. The ellipse literally wraps around the arc lamp, collecting 5 to 6 times more output power than a conventional system.

Dr. Roder Arc Lamp Housing Comparision

The arc source is located at one focal point of the ellipse, and the radiation is reflected by the ellipse to the secondary focus which is actually outside of the lamp housing. Since the light is brought to a focus by reflection rather than refraction (through a lens), there are less losses from absorption or lens-surface back-reflection. This design is so efficient that an OBB PowerArc™ lamp housing can deliver  up to 11 times more optical power into a given smaller area than a conventional lamp housing. This is critical when illuminating light guides, monochromator slits, pinholes or other small areas.

What this means is simply that you get the same output with an OBB 75 W system as with a conventional 450 W system. You obviously will save money and space.

While conventional lamp housings resemble chimneys emitting ozone and requiring cumbersome venting, the OBB PowerArc™ has a sealed lamp housing that requires no ozone venting.

Specifications

Lamp power capacity

75 to 150 watts

Height

100 mm (3.9 inches)

Width

100 mm (3.9 inches)

Length

210 mm (8.3 inches)

Weight

1.9 kg (4.2 pounds)

Window Diameter (D)

65 mm

Lamp Housing

 

Lamp Housing Dimensional Diagram

Note: There are M5 or 8/32 tapped holes on the bottom of the lamp housing to allow mounting of the housing to mounting posts.

Ozone-Free Arc Lamp Housing

We call the OBB PowerArc compact arc lamp housing design an ozone free lamp housing regardless of the lamp selected, even in the case of UV enhanced lamps. It is ozone free primarily because it is a sealed lamp housing that is air tight and not air cooled, unlike most arc lamp housings which use air cooling.

The PowerArc lamp housing with UV enhanced lamps has been tested following OSHA safety standards. While some ozone was detected outside the lamp housing, the ozone levels in the test room were well below the safe guidelines. Of course some UV light is delivered outside the lamp housing and into the air in the test room, and you can even detect this by smell, but not enough ozone is created to pose a health risk or require a chimney for venting.

Air cooled lamp housings have a real problem because they blow oxygen at the UV source, and, like blowing oxygen on a fire, this creates problems. One way to get around this problem with an air cooled lamp housing is to select a lamp that has an envelope that does not emit wavelengths below 250 nm. As such even an air cooled lamp housing will not create an ozone problem since there is no UV output outside the lamp itself. The problem with this solution is that many applications require deeper UV wavelengths.

If you require deep UV output for your application then you necessarily require a lamp that emits deep UV wavelengths. For these applications we recommend a UV enhanced lamp and a suprasil front window for the PowerArc lamp housing to get the most UV output you can. Even in this configuration, the sealed PowerArc lamp housing is still considered to be an ozone free lamp housing.

Since oxygen is the principle absorber of light in the 150 to 200 nm range, some applications, such as CD spectroscopy, require nitrogen purging to access the lowest UV wavelengths emitted from UV enhanced xenon lamps (down to about 180 nm). For output in the 180 to 200 nm range you will need to nitrogen purge your optical environment, and also to use no front face window on the lamp housing. The housing is now no longer air tight, but the nitrogen purging negates the concern for ozone creation.

The unique OBB PowerArc design allows you to choose whatever lamp, reflector and front face window is best for your particular optical needs. And the Ozone free design means that your choice is always safe and requires no venting or chimney to deal with.

Lamp

 

Lamp

You have a choice of lamps depending on the spectral output that you require. Of course you may order different types of lamps for the housing, they are interchangeable.

There are two types of arc lamps available—xenon and mercury. The xenon gas used in the lamp provides continuous spectra from 180 nm to 2,500 nm of course at varying intensity (refer to spectral output graph). The mercury provides a line spectra (refer to spectral graph). The spectral curves for xenon and mercury are normalized (relative intensities) therefore it is not obvious that the mercury lamps, intensity—where it emits, exceeds that of the xenon lamp. Because of the smaller arc size, the mercury lamp can also provide greater intensity in a smaller area (greater brightness) than the xenon lamp.

We also have an optional tungsten-halogen filament lamp for NIR applications.

Arc lamps come with a quartz or suprasil envelope depending on the application. Quartz lamps do not transmit the deep UV below 240 nm. Suprasil lamps do transmit  the deepest UV output from the arc down to about 180 nm. For either type of lamp envelope our unique lamp housing design does not create ozone and therefore requires no ozone venting.

 

Lamp Wattage

Lamp Type

Nominal Arc Gap

75 watt

Compact Arc Xenon

0.8 mm

100 watt

Tungsten Halogen Filament

4 x 2 mm

100 watt

Mercury

0.25 mm

75 watt

Suprasil Compact
Arc Xenon

1.3 mm

150 watt

Compact Arc Xenon
Ozone free

2.1 mm

150 watt

Compact Arc Xenon

2.1 mm

 

The 75 watt xenon lamp and 100 watt tungsten-halogen lamps require no cooling whatsoever. The larger wattages of lamps require water cooling.

You can either get your water directly from the cold-water tap (can be a problem if the water is hard or when water is not available) or from an inexpensive circulating water bath option that we provide.

We have selected water-cooling over air: because it allows us to make a more compact housing; seal in the ozone and eliminates the need for venting.

Reflector

Our ellipsoidal reflectors are proprietary in design and the coating used. They are NOT electro-formed reflectors, which can distort with heat, and can degrade within months. Our proprietary design ensures that distortion of the critical ellipsoid can not occur as the lamp reaches its operating temperature. This ensures thermal stability of focus. The coating ensures reasonably long operating life—typically 3-5 years.

With an OBB PowerArc™ lamp housing you have a choice of three different ellipsoidal reflectors depending on your requirements. The proprietary reflectors OBB Corp uses allows for the great 70% collection efficiency. In addition to collection of light the reflectors are used as focusing elements. Hence the selection of a reflector determines the focal length. The different focal lengths correspond to the different “focal cones” of light coming from your lamp housing. This “focal cone” is variously referred to as f/#, Numerical Aperture, and/or acceptance, convergence, or divergence angle.

The f/# is important when considering matching a light source to some other component, for example: fiber optics, liquid light guides or monochromators. However the f/# does not affect the light collection as it does in a simple lens design. The shape and size of the ellipsoidal reflector determines how much light is collected from the lamp arc, and the amount of delivered light is the same for all of OBB’s reflectors. Selection of your OBB reflector f/# is primarily based on matching the focal cone of the converging beam with any secondary optical elements you will be using. However the f/# also determines the focal distance and the focal spot size with lower f/#’s having shorter focal lengths and smaller spot sizes.

The spot size at the focus is directly related to the original arc gap size of the lamp and the focal length of the reflector. The larger the arc, or the longer the focal length, the larger the spot size at the focus. Hence if you want to have the maximum power in the smallest spot select the fastest focal length (f/1) and the smallest arc size lamp (100 W Mercury). This is another unique benefit of the OBB Corp’s system; we give you the most power in the smallest spot. No one using an arc lamp can match us in this regardless of their systems size or cost.

Reflector Selection Guide (dimensions are in millimeters)

Focal Length Diagram

 

f/4.5 reflector

f/2.5 reflector

f/1 reflector

Focal length (F)

379 mm

240.5 mm

112 mm

Focal point from housing (X)

284.35 mm

151.46 mm

22.25 mm

Beam angle (a)

14.5 degrees

28 degrees

45 degrees

Numerical Aperture N.A.

0.12

0.24

0.45

 

 

Window

The OBB PowerArc™ is a sealed arc lamp housing. You have a choice of the optical front windows, depending on the spectral output that you require. Please refer to the transmission spectra of the three types of windows available. If you plan to use different types of lamps in your lamp housing, you may want to order different windows or select Suprasil since it will transmit all spectra.

Window

Wavelength

Graph (click on image to enlarge)

Pyrex

Above 350 nm

Pyrex Window

Quartz

Above 250 nm

Quartz Window

Suprasil

Above 180 nm

Suprasil Window

Power Supply

 

The PowerArc™ lamp housing comes with one of two choices for the power supply and igniter.

Dedicated 75 or 100 Watt Power Supply:

If you are only ever going to use the 75 watt xenon lamp or 100 watt mercury lamp with your OBB PowerArc™ lamp housing, then we offer two dedicated compact power supplies and igniter units that are integrated onto the lamp housing. They are specially designed switch mode power supplies offering outstanding stability with a simple push button, electronically safe, ignition. In fact, although they are not DC regulated power supplies, OBB carefully designed them to offer virtually identical stability specifications to our linear power supply. When used with the PowerArc™ lamp housing this illuminator offers a very small form at a very affordable price.

PowerArc Power Supply and Ignitor

Compact Light Source Power Supply

75 Watt Switch Mode Power Supply Specifications

Input (user selectable)

90–274 V AC, 50–60 Hz

Power Rating

50 to 100 watts

Operating Voltage

10 to 25 volts

Operating Current

3 to 7 amps

Pre-Ignition Voltage

65–75 V DC

Ripple at Max Current

< 3% peak to peak

Stability After Warm-up

0.5%

Line Voltage Regulation

< 0.5% current variation for 5 volts line change

 

Universal 75 to 150 Watt Power Supply:

If you need to use a lamp other than 75 or 100 watts, then we offer a universal highly-regulated, constant current, linear, DC power supply. This universal power supply provides very stable power for arc lamps. It can also be used with a 100 watt tungsten-halogen filament lamp for enhanced IR output. Designed for use with various lamp housings, it may be used with lamp housings from other manufacturers. When used with an arc lamp in OBB’s PowerArc™ lamp housing, this stand alone power supply is connected to a compact igniter that is integrated onto the lamp housing for electronically safe ignition.

The DC regulated power supply pictured below has a current adjust for different operating wattages and can display operating voltage, wattage or current.

Universal Arc Lamp Power Supply

Universal Arc Lamp Power Supply

Universal Supply Connections for Arc Lamp
Universal Supply Connections for Arc Lamp

Universal Supply Connections for Tungsten Lamp
Universal Supply Connections for Tungsten Lamp

75 to 150 Watt Universal Power Supply Specifications

Input (user selectable)

105–120 V/60 Hz or 210–240 V/50 Hz

Power Rating

0 to 150 watts

Operating Voltage

10 to 24 volts

Operating Current

0 to 8 amps

Pre-Ignition Voltage

> 85 volts

Ripple at Max Current

< 10 millivolts

Stability After Warm-up

0.2%

Line Voltage Regulation

0.1% current variation for 5 volts line change

Load Regulation

0.1% current variation for 50% change in load impedance

Dimensions

4.5 x 10.75 x 12.5 inches, 11.5 x 27.3 x 31.8 cm

Weight

12 pounds, 5.45 kg

Ignition Safe Arc Lamp Igniter

Ignition noise can disrupt, or even destroy, sensitive equipment in the vicinity of an arc lamp during start-up. This can be quite a concern in a crowded lab environment. OBB Engineers introduced an igniter that is integrated onto the lamp housing. This design provides an effective EMI shield which contains the EMI pulse, providing a safer and more convenient environment in which to do your research.

Mounting Information

Please note at the that the mounting information is for the PowerArc™ with the integrated power supply/igniter..

 

Front View

PowerArc

 

Right View

Left View

PowerArc

PowerArc

 

Bottom View

PowerArc

Top View

Rear View

PowerArc

PowerArc

 

 

Monochromator Hardware

Optional Ports

This extremely rugged monochromator is built from a single solid metal casting that includes the base plate, optical mounts and all four sides of the unit. Inside the monochromator has extensive baffles to reduce stray light. There is an entrance and exit baffle box at the entrance and exit silts, as well as a center baffle that separates the input side from the exit side of the monochromator.

The monochromator has four optional ports that can be utilized for two inputs and two outputs. In the standard configuration it comes with one entrance and one exit port. This gives you a choice of four different input/output geometries:

180° Straight Line – with folding mirrors on entrance and exit

90° Right Angle – with folding mirror on the exit side

90° Left Angle – with folding mirror on the entrance side

360° – with no folding mirrors

Straight Line

Right Angle

180° Straight Line

90° Right Angle

Left Angle

360 Degree

90° Left Angle

360°

 

You can also elect as an option to have two entrance ports or two exit ports. This option adds an appropriate flipping mirror(s) and slit assemblies. The flipping mirror is manually switched to receive light from either entrance port, or to deliver light to either exit port depending on the configuration.

Dual Exit Ports

Dual Entrance Ports

Dual Entrance and Exit Ports

Dual Exit Ports

Dual Entrance Ports

Dual Entrance and Exit Ports

Slits

The monochromator slits are continuously adjustable manual slits with micrometers for adjustment from 0 to 6 mm. The micrometers have a digital readout of the physical slit size selected. The slit housing also has a manually sliding shutter to quickly shut off or open the light path. This manual slider also has a wedge height adjustment to allow you to select a slit height anywhere from 0 to 21 mm.

Gratings

There is a wide selection of gratings to choose from depending on the optical requirements. All gratings are 50 x 50 mm flat gratings. The Ruled gratings have better optical throughput and Holographic gratings have improved stray light characteristics. Ruled gratings have two fundamental parameters to choose from; the groove density, expressed in grooves (or lines) per millimeter, and the blaze angle which nominally refers to the peak reflectance wavelength expressed in nanometers.
The groove density affects the resolution and mechanical scanning range of the monochromator. Below is a reference chart showing the affect groove density has on the mechanical scanning range of the monochromator as well as the reciprocal linear dispersion.

 

Groove Density

Mechanical Scanning Range (nm)

Reciprocal Linear Dispersion (nm/mm)

2,400 g/mm

0 to 550 nm

2 nm/mm

1,200 g/mm

0 to 1,100 nm

4 nm/mm

600 g/mm

0 to 2,200 nm

8 nm/mm

300 g/mm

0 to 4,400 nm

16 nm/mm

150 g/mm

0 to 8,800 nm

32 nm/mm

 

An optional dual grating mount allows you to select two different gratings, say to optimize throughput in different wavelength ranges. The gratings are positioned back to back and a switch dial is available at the top of the monochromator to manually choose which grating is to be used.

Below is a list of our standard gratings. Other gratings are also available upon request.

Available Gratings

Part #

Description

Grating Curve

200

600 g/mm, 1,250 nm blaze

Download Curve

201

1,200 g/mm 300 nm blaze

Download Curve

202

1,200 g/mm 400 nm blaze

Download Curve

203

1,200 g/mm, 500 nm blaze

Download Curve

204

Holographic grating 300–800 nm

Download Curve

205

75 g/mm 10.0 µm blaze

Download Curve

206

150 g/mm, 4.0 µm blaze

Download Curve

207

300 g/mm, 2.0 µm blaze

Download Curve

209

600 g/mm, 750 nm blaze

Download Curve

211

600 g/mm 1.0 µm blaze

Download Curve

212

1,200 g/mm, 600 nm blaze

Download Curve

213

1,200 line/mm, 750 nm blaze

Download Curve

 

 

Wavelength Control

The monochromator wavelength is controlled with a manual dial and readout. The readout is designed to be in true wavelength in nanometers for the 1,200 g/mm grating. For other gratings you have to multiply the dial readout by a factor depending on the actual grating resolution. For example with the 600 g/mm grating you multiply the digital readout by 2 to arrive at the true wavelength position of the monochromator.

 

Computer Control

An optional computer control accessory is available. It includes a stepper motor assembly, a USB motor controller interface box and an SDK for control of the monochromator wavelength from third party software packages for users with programming experience.

A very simple software package is also provided by OBB to remotely select the wavelength and control the shutter. Requires Windows 2000 or Windows XP operating system.

Software Screen Shots
Click to enlarge

Monochromator Software

Monochromator Software

*LabVIEW is a trade mark of National Instruments

Tunable PowerArc™ Illuminator Hardware

Coupled together with a rigid adapter tube, the Tunable PowerArc™ Illuminator is a single portable self aligned light source. Below is the schematic for the complete illuminator.

Tunable Illuminator Schematic

Specifications

Tunable PowerArc™ Output Curves

You can customize a Tunable PowerArc™ Illuminator to suit your specific needs. The lamp and grating selected primarily determine the performance of the illuminator. However for any given lamp and grating the slit adjustment (or bandwidth) selected will also affect the intensity output of the unit.

Below are a series of intensity output curves for different configurations of the Tunable PowerArc™ Illuminators. There are far too many variables to provide output curves for all possible combinations for these illuminators. If you are interested in an illuminator with a different grating than those shown below, then you can compare the grating curves of that grating with one listed below to get a pretty good idea of how your particular illuminator will perform.

 

Output curve with 300 nm blazed grating

Output curve with 750 nm blazed grating

The Tunable PowerArc™ Illuminator can deliver up to 10 milliwatts of tunable light output!

Physical Specifications

Dimensions (WxDxH)

31 x 12 x 9 inches

Weight

7.5 lbs

Optical Performance Specifications

Optical Power

> 10 mW (grating, bandpass & wavelength dependent)

Spot Size at Slit Exit

5 to 10 mm (lamp and slit dependent)

Diverging Beam Angle (full)

14.5 degrees

Numerical Aperture (N.A.)

0.12

Optical Noise

0.07% RMS

Optical Stability

0.2%

75 Watt Switch Mode Power Supply Specifications

Input (user selectable)

90–274 V AC, 50–60 Hz

Power Rating

50 to 100 watts

Operating Voltage

10 to 25 volts

Operating Current

3 to 7 amps

Pre-Ignition Voltage

65–75 V DC

Ripple at Max Current

< 3% peak to peak

Stability After Warm-up

0.5%

Line Voltage Regulation

< 0.5% current variation for 5 volts line change

75 to 150 Watt Universal Power Supply Specifications

Input (user selectable)

105–120 V/60 Hz or 210–240 V/50 Hz

Power Rating

0 to 150 watts

Operating Voltage

10 to 24 volts

Operating Current

0 to 8 amps

Pre-Ignition Voltage

> 85 volts

Ripple at Max Current

< 10 millivolts

Stability After Warm-up

0.2%

Line Voltage Regulation

0.1% current variation for 5 volts line change

Load Regulation

0.1% current variation for 50% change in load impedance

Dimensions

4.5 x 10.75 x 12.5 inches, 11.5 x 27.3 x 31.8 cm

Weight

12 pounds, 5.45 kg

Arc Lamp Spectrum Band Pass Intensity Charts

Xenon Arc Lamp Spectrum

Xenon Arc Lamp Spectrum

Xenon Arc Lamp Intensity Chart

Wavelength

% output

Wavelength

% output

Wavelength

%output

Wavelength

% output

250-300

2.489

750-800

4.682

1250-1300

0.896

1750-1800

0.345

300-350

3.540

800-850

8.914

1300-1350

0.705

1800-1850

0.306

350-400

4.577

850-900

6.284

1350-1400

0.931

1850-1900

0.306

400-450

5.245

900-950

6.788

1400-1450

0.919

1900-1950

0.306

450-500

5.626

950-1000

5.848

1450-1500

1.118

1950-2000

0.268

500-550

5.214

1000-1050

2.871

1500-1550

0.701

2000-2050

0.345

550-600

5.729

1050-1100

1.953

1550-1600

0.513

2050-2100

0.230

600-650

6.472

1100-1150

1.402

1600-1650

0.515

2100-2150

0.230

650-700

5.649

1150-1200

1.593

1650-1700

0.552

2150-2200

0.230

700-750

4.862

1200-1250

0.846

1700-1750

0.428

TOTAL

100.000

 

Mercury/Xenon ArcLamp Spectrum

mercury Xenon arc lamp spectrum

Mercury/Xenon Arc Lamp Intensity Chart

Wavelength

% output

Wavelength

% output

Wavelength

%output

Wavelength

% output

260-270

2.205

380-390

0.538

500-510

0.199

800-900

3.186

270-280

2.678

390-400

0.488

510-520

0.199

900-1000

2.947

280-290

2.877

400-410

2.862

520-530

0.199

1000-1100

3.942

290-300

4.231

410-420

0.304

530-540

0.249

1100-1200

3.544

300-310

3.883

420-430

0.319

540-550

3.325

1200-1300

2.190

310-320

5.730

430-440

5.207

550-560

1.563

1300-1400

4.580

320-330

0.538

440-450

0.498

560-570

0.249

1400-1500

2.091

330-340

1.572

450-460

0.199

570-580

3.463

1500-1600

2.449

340-350

0.448

460-470

0.199

580-590

4.908

1600-1700

2.051

350-360

0.886

470-480

0.199

590-600

0.521

1700-1800

2.190

360-370

8.403

480-490

0.229

600-700

3.467

1800-1900

1.990

370-380

1.473

490-500

0.483

700-800

2.041

1900-2000

1.990

 

UV illumination down to 180 nm

Although the spectral output charts above do not show data below 250 nm, the PowerArc can deliver light down to 180 nm, the lowest available wavelength emission of the xenon plasma. Some arc lamps use quartz envelope bulbs that do not transmit UV wavelengths. These lamps are sometimes called ozone free bulbs because they do not emit in the deep UV and hence create ozone when interacting with oxygen in the air. We offer both ozone free and UV enhanced bulb choices, as well as different window materials for the front output of the lamp housing, so that our customers can choose the best components for their requirements.

For requirements below 250 nm please select from one of the two following xenon lamps when requesting your quote.

Part Number

Description

142

75 W suprasil (extended life) xenon arc lamp, output above 180 nm

145

150 W xenon arc lamp, output above 210 nm

 

Higher Resolution Gratings Can Provide Higher Intensities

The data curves above are all from illuminators that had a 1,200 g/mm grating. You will note from these curves that doubling the bandpass, or slit size, typically results in a factor of four increase in intensity. This is true as long as the slit size is the same or equal to the optical spot size. Therefore if you used a 2,400 g/mm grating you would be doubling the slit size from a 1,200 g/mm grating to maintain an equivalent bandpass. Thus a Tunable PowerArc™ Illuminator equipped with a xenon lamp and a 2,400 g/mm grating blazed at 300 nm will give you up to 80 milliwatts of optical power in a 20 nm bandpass. However the 2,400 g/mm grating will only mechanically scan up to 600 nm, see monochromator for more details.

 

Applications

Applications for the Tunable PowerArc Illuminator cover a broad range of scientific, OEM and research applications. These illuminators are the light sources of choice for a variety of spectroscopy systems.

Light Source for,

  • Fluorometers
  • UV /Vis Spectrometers
  • CD Spectrometers
  • Stopped-Flow Spectrometers
  • Tunable Illuminators

Tunable illuminators are also used for a broad a range of applications almost as diverse as the wavelength range across which they emit.

  • Detector calibration
  • Solar Simulators
  • Photochemistry
  • Photo-Activation
  • Photobiology
  • Photovoltaics
  • Spectroscopy
  • Optical Teaching Labs
  • Dermatology

Accessories

The Tunable PowerArc™ Illuminator is one of many inter-connectable optical components. Hence the name of our company, Optical Building Blocks Corporation. These Optical Building Blocks can be ordered together to form a complete subassembly or they can be subsequently added to one another. In fact there are enough OBB components to choose from to build your own complete optical system for various spectroscopy requirements.

Compatible Optical Building Blocks

Optical Shopper

Optical Choppers

If you would like to convert the continuous illumination of the Tunable PowerArc™ Illuminator into a pulsed light source then we have an optical chopper that can do the job. It can be used on a stand alone basis after the output from the monochromator. To learn more click here.

Light Source, Monochromator and Optical Chopper

Sample Compartment

Sample Compartment

If you would like to couple your Tunable PowerArc™ Illuminator into a sample compartment, then we have an ideal solution. The OBB QuadraCentric sample compartment is an excellent unit that has various sample handling capabilities. The illuminator is f/# matched with the collection optics of the sample compartment for optimum throughput. You can then have up to three other input or output optical channels to or from the central sample holder. So you could create a right angle fluorometer or scatter system or a straight through absorbance spectrometer with the appropriate detection components. For each optical channel in the sample compartment there is also a filter holder for wavelength selection. To learn more click here.

Light Source, Monochromator and Sample Compartment

Liquid Light Guide

Light Guides

Liquid light guides have become the flexible light guide of choice for non laser based light handling. OBB Corporation has a selection of liquid light guides to choose from, as well as specialty fiber optic bundles. If you would like to use a light guide with your Tunable PowerArc illuminator then we have an adapter that will connect the light guide to the exit of the monochromator.

Light Source and Liquid Light Guide

 

Other Accessories

Collimating Lenses

If you need a collimated optical beam, then a collimating lens can be employed for the diverging beam after the light focal point. Be sure to match the collimating lens for your beam diameter requirements and for the f/# of the OBB light source you are considering. OBB offers a number of collimating lenses to choose from. Also if you need a uniform collimated beam of light be sure to consider an optical diffuser.

Optical Diffuser

An optical diffuser is necessary when uniform illumination over a targeted area is required.

Programmable shutter

A computer controlled shutter can be ordered at the time of original order. The programmable shutter is positioned inside the monochromator at the entrance port, so selecting this option precludes the use of a folding mirror or flipping mirror on the entrance port of the monochromator. The programmable shutter requires the MD-2000 USB motor controller interface box for control with LabVIEW* software from National Instruments. A very simple software package is also provided by OBB to remotely control the shutter. Requires Windows 2000 or Windows XP operating system.

Second entrance or exit port

A second entrance to attach for example a second light source or a second exit can be added to the monochromator. It includes a flipping mirror for selecting desired exit or entrance as well as a slit assembly. If you desire both two exits and two entrances for the monochromator you need two of these accessories. Please note that if you select the optional computer controlled shutter, it is positioned inside the monochromator at the entrance port, so selecting this option precludes the use of a flipping mirror on the entrance port of the monochromator.

Dual Exit Ports

Dual Entrance Ports

Dual Entrance and Exit Ports

Dual Exit Ports

Dual Entrance Ports

Dual Entrance and Exit Ports

 

Nitrogen Inlet Port

If you plan to use the monochromator with UV, below 250 nm, you may wish to purge the monochromator with nitrogen gas to eliminate oxygen, which absorbs in the UV.

Programmable Computer control

An optional computer control accessory is available. It includes a stepper motor assembly, an MD-2000 USB motor controller interface box and a LabVIEW* driver for computer control of the monochromator wavelength with LabVIEW software from National Instruments.

A very simple software package is also provided by OBB to remotely select the wavelength and control the shutter. Requires Windows 2000 or Windows XP operating system.

Software Screen Shots
Click to enlarge

Monochromator Software

Monochromator Software

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