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Small and Medium Aperture Collimators

The CI Systems ILET (Intermediate Level Electro-Optical Tester) family of test systems is ideally suited for performing I-level optical tests and laboratory testing.

Portable, compact and computerized, ILET testers can be placed in a mobile test van and enable full testing of thermal imagers and visible light sensors, without recourse to D-level facilities.

The basic ILET configuration includes an optical collimator, a radiation source (blackbody and/or visible light source) and a target wheel (manual or motorized).

The ILET is easy to use when interfaced with CI’s software (optional), minimizing testing turnaround time and maximizing testing objectivity and repeatability.

The testers are designed to retain their accuracy over a wide range of temperatures. Thanks to the ILET’s outstanding features and versatility, it is useful in a variety of applications such as testing inside environmental chambers, testing on production lines or testing in the field.

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  • Portable
  • Easy to operate
  • Rugged construction design per MIL-STD 810G (secured cargo)
  • Tripod mountable
  • All functions can be controlled via a computer using CI Systems’ CTE automatic test software (optional)
  • Optional ILET models outfitted for operation in an environmental chamber

Collimator type:

Off axis, reflective

Primary mirror:

Parabolic,pyrex or aluminum

Spectral band:

0.4 µm to 15 µm

Target wheel:

Motorized or manual

Operational Temp. range

from +10 deg°C to +35 deg°C

Optional Chamber model:

from -40 deg°C to +80 deg°C


Ethernet , RS232


"Blackbody models: SR-800N-2D, SR-200N
Integrating sphere model: SR300N-1-close-mot
or other visible light source upon request"


Model ILET-2-2.9 ILET-4-2.0 ILET-5-1.1 ILET-5-2.0 Short ILET-6-2.0
Clear Aperture [inch] 2 4 5 6 6
Focal Length [inch] 10.83 30 30 15 40
FOV [deg.] 2.9 2.0 1.1 2.0 2.0
Target positions, standard (1) x1 x8 x16 x16 x8
Weight [kg.] (2) 4 12 12 23 23


(1)  Different number of target positions available upon request(1)  Different number of target positions available upon request

(2)  Weight and sizes may vary depending on the specific configuration


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