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Setting New Standards In Electro-Optical Testing

Multi-Channel Radiometer

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The ColoRad is a multi-channel radiometer which is able to perform simultaneous radiometric measurements in up to 4 channels (two of which can be cryogenically cooled) with high sensitivity and speed. A new ColoRad model was introduced in December 2007. The new ColoRad includes many improvements over older units and its performance is much enhanced. The new ColoRad is the perfect tool for performing field measurements in a number of defined spectral bands.

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OptionsSpecificationsSpectral engines
  • Radiometric channels are customer configurable and cover the range 0.2÷14 µm
  • Field of view (FOV) options for 40 or 80 mrad with the ability to add telescopes for wide or narrow FOV (as an example, a ColoRad may be ordered with 40 mrad FOV and an additional set of telescopes to increase the FOV to 80 mrad)
  • Operates in chopped mode for high sensitivity and direct mode for fast measurements (with sampling rates > 100 KHz/channel)
  • User replaceable spectral filters and ND filters easily replaced during operation
  • Comes complete with a small ruggedized PC and Power supply in separate carry case




Number of Channels

2-4 channels

Up to 2 cryogenic cooled channels, configurable spectral engine combinations

Filters (per channel)

1 spectral filter

1 ND filter

2 filter slides in the optical path for each channel


ND1, ND2, ND3

Included for each channel

Filter Slides

Accommodate 1”  diam. filter, 1.6 mm thick

User mountable

Field of View non-uniformity

2.3° (40 mrad) or 4.6° (80 mrad)

Optional attachable telescopes

Field of view Size accuracy

< 10% of maximum


Channel Bore sight Accuracy

< ±10% FWHM


Modes of operation

±0.2° (±3 mrad)


Chopping Frequency

Lock In (LIA) for high sensitivity Direct (DIR) for high speed

AC Coupled

DC Coupled

DIR  mode Band Width

100 - 1000 Hz

SW controlled chopper.

DIR Mode rise time

60kHz (-3db)

Chopper is in hold position

DIR Mode Gain Selection

< 10µsec



1, 10, 100

SW selectable

Data Acquisition

10-9-10-10 W/cm2 for DIR mode

10-10-10-12 W/cm2 for LIA mode

Depending on the specific channel

Control Interface

Up to 200 Ksample/sec/channel


Data interface

RS232 (9600 Baud)


Optical head to controller distance

USB 2.0


Bore sight Viewer

5 meter cable to the PC

manual contrast control of  FOV overlay pattern

Bore sight Viewer FOV

CCD with FOV marker overlay and cross hair


Weight of optical head

> 5°  or  > 10°


Optical head Dimensions

< 25 Kg

Depending on number of channels

Power supply

L 735 x W 294 x H 329 mm

With shade cover

Environmental Conditions - Work

100 - 240 VAC  50-60 Hz

External power supply with 5m cable

Environmental Conditions - Storage

0°C ÷  40°C


Condensation prevention

-15°C ÷70°C

Storage in case

Carry case dimensions

Dry N2 purge valve available



L 857 x W 730 x H 429

Rugged carry case with compartments for cables and accessories

  • Available detectors: Si, PbSe, InGaAs, InSb, MCT, PV-MCT
  • Available appertures: 23/48mm.