Mechanism of eyepiece for endoscope

Details Mechanism of eyepiece for endoscope Mechanism of eyepiece for endoscope

1989-03-07

1992-01-07

Arnold, Bruce Y.

Optical: systems and elements

Lens

With support

359703, G02B 702, G02B 1500

Patent

active

050785036

ABSTRACT:
A mechanism of an eyepiece for an endoscope which is designed so that an ocular lens is movable along the optical axis for the purpose of dioptric adjustment and, when an attachment of a photographic recording device or an imaging device is attached to the eyepiece, the ocular lens is automatically moved to a predetermined projection position within the range of dioptric adjustment, no matter where the ocular lens is disposed in the dioptric adjustment range at that time. The mechanism comprises an ocular lens disposed so as to face an emergent end face of an image guide, a diopter adjusting device for adjusting the level of diopter by causing the ocular lens to move back and forth along the optical axis, a moving device for moving the ocular lens for projection, the moving device being activated in response to attaching of an attachment to the eyepiece so as to move the ocular lens to a predetermined projection position halfway in the range of dioptric adjustment from either one of the two positions, that is, a position which is forward of the projection position and a position which is rearward of it, and a pre-moving device for previously moving the ocular lens when disposed at the other of the two positions to the first position in response to attaching of the attachment to the eyepiece.

REFERENCES:
patent: 4351587 (1982-09-01), Matsuo et al.
patent: 4367730 (1983-01-01), Tanaka
patent: 4404964 (1983-09-01), Kanbara
patent: 4412728 (1983-11-01), Sakane et al.
patent: 4580559 (1986-04-01), L'Esperance
patent: 4848895 (1989-07-01), Kato et al.
English translation abstract for Japanese patent document 60-15618.

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