Title:
【発明の名称】写真撮影で孔腔模様が施されている角膜計
Document Type and Number:
Japanese Patent JPH09500567
Kind Code:
A
Abstract:
An improved conical keratometer wherein the parent image of the pattern to be reflected upon a target positioned adjacent to the illuminated bore is recorded on a film slide retained within the keratometer bore. Opposite edges of the slide are chamfered at equal but opposite angles so that, when the spindeled slide is released, the chamfered edges will meet along a line of contact rather than butting squarely together. The film slide is rolled so that the emulsion side is toward the periphery of the cone bore and the chamfering allows that side to lie smoothly against the cone bore without any gaps so that an undistorted image may reliably be reflected upon a standard target.
Inventors:
Tibling, Lars
Morse, Roy
Morse, Roy
Application Number:
JP52344095A
Publication Date:
January 21, 1997
Filing Date:
January 23, 1995
Export Citation:
Assignee:
Computed Anatomy, Inc.
International Classes:
A61B3/10; A61B3/107; (IPC1-7): A61B3/10
Attorney, Agent or Firm:
Kobayashi Koji