Inter-pupillary distance adjustment device

A device for adjusting inter-pupillary distance between eyepieces, the device comprising:

• a pinion gear, wherein the pinion gear is mounted on a first pin of a plurality of pins, wherein the pinion gear rotates about a first axis;
• a plurality of carrier plates, wherein each of the plurality of carrier plates having gear teeth on a first portion of a side, wherein the gear teeth on the plurality of carrier plates are in mesh with the pinion gear, wherein the plurality of carrier plates are positioned parallel and opposite to one another, wherein rotation of the pinion gear provides rectilinear motion of same magnitude to the plurality of carrier plates in opposite direction to one another and wherein each of the plurality of carrier plates comprises a plurality of slots;
• a plurality of focal plane arrays, wherein each of the plurality of focal plane arrays are rigidly affixed with a first carrier plate of the plurality of carrier plates and movably supported over a second carrier plate of the plurality of carrier plates;
• a plurality of telescopic elements, wherein each of the plurality of telescopic elements is mounted on a focal plane array of the plurality of focal plane arrays;
• and
• a support plate for supporting the pinion gear, wherein the support plate comprises a plurality of pins, wherein each of the plurality of pins is received in a slot of the plurality of slots of a carrier plate of the plurality of carrier plates,
• wherein the device enables inter-pupillary distance adjustment between eyepieces without causing skew or distortion of image.