Laboratory Collimators
System Use and DescriptionThe EOI LC series of high resolution, reflecting collimators are used to provide a collimated source of infrared or visible energy to a system under test. EOI's LC series of collimators offer high on axis performance with no obscuration and will accommodate a variety of sources at the focal plane. Clear aperture diameters are available from 3 inches to 16 inches. EOI collimators are diffraction limited2 in the mid IR band at ambient temperature range of 20 to 30°C. Options are available to allow visible sensor testing or testing over
large temperature extremes. Either manual or motorized focus stages may be
added to test sensors with adjustable range or focus. |
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| The primary mirror surface is
an off-axis, circular segment of a paraboloid. The primary is aluminized
for high reflectivity with a SiO overcoated for durability. The flat
folding mirror is coated with protected silver for best reflectivity at 45
degree incidence. Optional gold coatings are also available.
Collimators may be ordered with an EOI blackbody radiation source or differential temperature source mounted on the source support plate. If the blackbody is equipped with a target or aperture wheel, the target or aperture surface will be located at the focal plane. EOI also offers modified or custom collimators, both reflective and refractive, to meet your requirements. |
Note: Gold coatings may require periodic mirror recoating and have a limited warranty. |
Dimension in Inches
| Model | Clear1 Aperture |
Focal3 Length |
Maximum4 Target Background |
Field of View (Deg) |
| LC-03 | 3 | 15 | 0.5 | 2.0 |
| LC-04 | 4 | 20 | 0.75 | 2.0 |
| LC-05 | 5 | 25 | 1.0 | 2.0 |
| LC-06 | 6 | 30 | 1.0 | 2.0 |
| LC-08 | 8 | 40 | 1.5 | 2.0 |
| LC-10 | 10 | 50 | 1.8 | 2.0 |
| LC-12 | 12 | 60 | 2.0 | 2.0 |
| LC-14 | 14 | 70 | 2.0 | 2.0 |
| LC-16 | 16 | 80 | 2.0 | 2.0 |
| Contact
EOI for: Larger Sizes, Different Focal Lengths or Field of View |
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1
Clear aperture clear aperture clear aperture is defined by on-axis radiation and the circular aperture at the front plate of the collimator housing. Off-axis radiation will decrease the usable aperture.2
Note that the blur circle due to diffraction in milliradians = 0.244 x wavelength in micrometers ÷ aperture diameter in centimeters. An optical mirror is generally considered to be diffraction limited if its surface does not depart from a perfect figure by more than 1/4 of the wavelength of interest when measured peak to valley or approximately 1/19 of the wavelength when measured as an rms error. Calculate the diffraction limited target frequency.3 Focal length is nominally 5 x Clear Aperture or f-5.
4 Two inches is the standard EOI target diameter. Contact EOI for larger target sizes.
How to Order
Select desired model; Example: Model LC-14 /AFM is a 14 inch clear aperture system with a motorized focus stage.
This is data sheet EO663C. Information regarding this data sheet and any requests for data sheets may be directed to eoi@electro-optical.com. Specifications subject to change.
