Bausch-Lomb Incorporated

Amarel Precision Instruments, Inc.

Edwin A Hazard

Richard C Mohrman

Peter Augusto

An oblique viewing system is attachable to a microscope to selectively obtain a perpendicular view (along the optical axis of the microscope) and oblique views of surfaces of objects under inspection. The attachment is connected to the microscope's objective end by a coupling on a housing containing the viewing system. The system includes a folding mirror and an oblique viewing mirror, spaced from the folding mirror and having its reflecting surface facing the object under inspection. A latching or a toggle mechanism, connected to a rotatable support for the folding mirror, enables that mirror to be set in either of two positions, one out of the way of the perpendicular path to provide a perpendicular view and the other to orient the reflecting surface thereof to face the reflecting surface of the oblique viewing mirror along an optical axis there between. The oblique viewing mirror is supported in a mechanism which enables rotation and translation thereof so as to maintain the optical path to the microscope approximately the same over a range of oblique viewing angles to the surface of the object under inspection. A lens movable along the optical axis between the mirrors adjusts the focus to accommodate different vertical heights of the surface under inspection. By virtue of this lens and the mechanism for orienting the viewing mirror, focusing adjustments of the microscope are made unnecessary.

Oblique viewing system for microscopes

A binocular opthalmometer has rotatable imaging optics which provide an image of a referencing element (mire) to a binocular viewing assembly. The viewing assembly is held stable (horizontal) by referencing it to a fixed support or stand in which the rotatable optics are journaled. The referencing mechanism is provided by a shaft mounted for rotation about an axis radially spaced from the axis of rotation of the imaging optics and which is rotatably coupled at one end to the stationary support and at the other end to the viewing assembly.

Opthalmometer

A compact refraction instrument for use in both the objective and subjective examination of human eyes. The instrument incorporates an alignment mode, a retinoscopy mode, a distance mode and near mode. For carrying out the functions associated with these modes, the instrument includes a Brewster stereoscope and a system for supporting a plurality of binocular/monocular vision testing slides. Positioned along the pair of optical paths between the Brewster stereoscope and the slide supporting system are: a first mask/septum system; a mode change system; a second mask/septum system; and a horizontal/vertical target mask system. The instrument also includes a refractor system and apparatus for suspending the refractor system in the optical paths before the Brewster stereoscope. The slide supporting system includes two rotatable concentric drums. The mode change system includes a first mirror for folding the optical paths when the instrument is used for subjective testing at a distance and near vision testing. Alternately, for retinoscopic examination, the paths are folded by a pair of mirrors having an opening therebetween. The Brewster stereoscope and both septums are rotatable so that they can be inserted into or removed from the optical paths as required by the various modes of operation of the instrument.

Compact refraction instrument

A compact refraction instrument for use in both the objective and subjective examination of human eyes. The instrument incorporates an alignment mode, a retinoscopy mode, a distance mode and near mode. For carrying out the functions associated with these modes, the instrument includes a Brewster stereoscope and a system for supporting a plurality of binocular/monocular vision testing slides. Positioned along the pair of optical paths between the Brewster stereoscope and the slide supporting system are: a first mask/septum system; a mode change system; a second mask/septum system; and a horizontal/vertical target mask system. The instrument also includes a refractor system and apparatus for suspending the refractor system in the optical paths before the Brewster stereoscope. The slide supporting system includes two rotatable concentric drums. Each drum is formed from a plurality of vision testing slide holders supported between a pair of ring gear members. The drums are supported by at least two shafts. The first shaft includes gearing which cooperates with at least one of the ring gear members of the inner drum and rollers which support the outer drum. The second shaft includes gearing which cooperates with at least one of the ring gear members of the outer drum and rollers which support the inner drum. Preferably, third and fourth support shafts are also included which have rollers thereon that are biased into engagement with the drums. The apparatus for rotating the drums includes stepping motors.

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Rochester, NY, United States of America

Edwin A Hazard