Question

Anti reflection coated optics reduce __________

(a) Optical transmission losses

(b) Reflection angle

(c) Refraction

(d) Intensity of star image

This question was posed to me in a job interview.

The doubt is from Stellar Sensor Design topic in chapter Celestial Navigation, Doppler and Altimeter Radars of Avionics

Answer 1

Correct option is (a) Optical transmission losses

For explanation: For anti-reflection coated optics, the optical transmission losses may be 1% or 2% at each air to glass or glass to air optical control surface within the telescope, including windows or sensor covers or surfaces. For uncoated optics, the loss per surface is about 4% to 5%.