Patent ID: 6924933
Filing Date: 2005-08-02
Classification: G02B

Abstract:
1. Binoculars comprising: a first focal adjustment lens system; a second focal adjustment lens system; a focal adjustment shaft that performs a focal adjustment by causing the first focal adjustment lens system and the second focal adjustment lens system to move along optical axes thereof; and a dioptric deviation adjustment shaft that performs a dioptric deviation adjustment by causing the first focal adjustment lens system to move alone the optical axis, wherein the focal adjustment shaft is set parallel to the dioptric deviation adjustment shaft; the dioptric deviation adjustment shaft is linked with the first focal adjustment lens system; the focal adjustment shaft is linked with the second focal adjustment lens system and the dioptric deviation adjustment shaft; the focal adjustment shaft includes a first linking member and a second linking member that connect the focal adjustment shaft with the dioptric deviation adjustment shaft and the second focal adjustment lens system respectively; and at least one of the first linking member and the second linking member of the focal adjustment shaft includes a means for inhibiting rotation of the focal adjustment shaft.