Laboratory Collimators

EOI’s LC series of high resolution, reflecting
collimators are used to provide a collimatedsource 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. The collimators arediffraction limited2 in the mid IR band at ambient
temperature 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 withadjustable range or focus.
The primary mirror surface is an off-axis, circularsegment of a paraboloid and aluminized for highreflectivity with a SiO overcoated for durability.
The flat folding mirror is coated with protectedsilver 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 witha target or aperture wheel, the target or aperturesurface will be located at the focal plane.

Optional Equipment
Athermal Systems
Gold Mirror Coating
Manual Adjustable Focus
Motorized Adjustable Focus
Visible Test Quality Mirrors(1/4 Wave @ 633 nm)
Note: Gold coatings may require periodic
mirror recoating and have a limited
warranty.

Collimator with Blackbody and Target
Wheel!Calculate the diffraction limited target
frequency.
!Calculate target frequency or bar widthfor different focal lengths.

859 Ward Dr — Santa Barbara, CA 93111-2960 — Phone 805-964-6701 — Fax 805-967-8590
E-mail eoi@electro-optical.com

www.electro-optical.com

Dimension In Inches
ModelNumber

Clear1 Aperture

Focal3
LengthMaximum4
TargetBackground

Field ofView
(Deg)

LC-03

315

0.5

2.0

LC-04

4

20

0.75

2.0

LC-05

525

1.0

2.0

LC-06

630

1.0

2.0

LC-08

840

1.5

2.0

LC-10

1050

1.8

2.0

LC-12

1260

2.0

2.0

LC-14

1470

2.0

2.0

LC-16

1680

2.0

2.0

1

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. 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 incentimeters. An optical mirror is generally considered to be diffraction limited if its surface does not depart from a perfectfigure by more than 1/4 of the wavelength of interest when measured peak to valley or approximately 1/19 of thewavelength 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 adjustable focus
stage.
This is data sheet eo663CLabColimators. Information regarding this data sheet and any requests for data sheets may be directed toeoi@electro-optical.com.
Specifications subject to change without notice.

Copyright ©1999 Electro Optical Industries, Inc.

eo663CLabColimators

859 Ward Dr — Santa Barbara, CA 93111-2960 — Phone 805-964-6701 — Fax 805-967-8590
E-mail eoi@electro-optical.com

www.electro-optical.com