According to the military handbook MIL HDBK 141 (23 3 5 3), the Ramsden eyepiece (Fig 5 105) is made up of two planar convex lenses of equal focal length AElig ' separated by a distance 2 AElig ' 3 Determine the overall focal length f of the thin lens combination and locate the principal planes and...

According to the military handbook MIL-HDBK-141 (23.3.5.3), the Ramsden eyepiece (Fig. 5.105) is made up of two

Question:

According to the military handbook MIL-HDBK-141 (23.3.5.3), the Ramsden eyepiece (Fig. 5.105) is made up of two planar-convex lenses of equal focal length Æ’' separated by a distance 2Æ’'/3. Determine the overall focal length f of the thin-lens combination and locate the principal planes and position of the field stop.

Fig. 5.105

Field-lens Eye-lens Exit Field pupil stop