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1 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.
2 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.
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.
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