Steven L Lange

US Patent:

51161150, May 26, 1992

Filed:

May 9, 1990

Appl. No.:

7/521487

Inventors:

Steven R. Lange - Tucson AZ
Edmond H. Thall - Tucson AZ

Assignee:

Wyko Corporation - Tucson AZ

International Classification:

A61B 310

US Classification:

351212

Abstract:

A thin, flexible, reflecting diffuse material is placed or formed on an anterior surface of a cornea. The material has properties that precisely conform to changes in shape of the cornea. This allows remote sensing of the shape of the cornea by projected fringe contouring.

US Patent:

50556959, Oct 8, 1991

Filed:

Jun 28, 1990

Appl. No.:

7/545404

Inventors:

Steven R. Lange - Tucson AZ

Assignee:

Wyko Corporation - Tucson AZ

International Classification:

G01B 902

US Classification:

2504591

Abstract:

A system for aligning a test beam of an infrared interferometer with a reference beam thereof includes a phosphor screen positioned in a common path of the interferometer at a focal point of a lens in the path. The phosphor screen is illuminated with ultraviolet light to stimulate an area of the phosphor screen to emit visible light. Infrared laser light from the test beam is focused onto a spot of the phosphor screen. The infrared laser light acts on the spot to prevent the phosphor screen from emitting visible light from the spot and hence the position where the laser beam strikes the phosphor screen appears dark. Visible light emitted by the phosphor screen is focused into a visible light camera, and an image of visible light emitted by the phosphor screen is produced on a video monitor. The dark spot on the phosphor screen appears as an image spot on the video monitor. The test beam is adjusted to move the image spot to a predetermined location of the video monitor representing an aligned condition.

US Patent:

49848933, Jan 15, 1991

Filed:

Dec 1, 1989

Appl. No.:

7/444542

Inventors:

Steven R. Lange - Tucson AZ

Assignee:

Wyko Corporation - Tucson AZ

International Classification:

G01B 1124

US Classification:

356376

Abstract:

A phase shifting projector includes an incandescent lamp, a heat-absorbing filter filtering infrared light from the incandescent lamp, a condensing lens receiving light from the filter, a transparent slide having a sinusoidal grating thereon, a projecting lens, a rotatable transparent plate disposed between the slide and the projecting lens, a test surface on which the grating is projected, and a stepper motor connected to the transparent plate for rotating it about an axis generally parallel to a line of the grating to modulate the phase of the grating image projected on the test surface.