Apparatus for and method of measurement of aspheric surfaces...

Details Apparatus for and method of measurement of aspheric surfaces... Apparatus for and method of measurement of aspheric surfaces...

2006-07-04

2006-07-04

Toatley, Jr., Gregory J. (Department: 2877)

Optics: measuring and testing

By light interference

Holography

C356S513000

Reexamination Certificate

active

07072042

ABSTRACT:
An aspheric surface measuring apparatus includes an interferometer which generates incident light; a test piece having an aspheric surface from which the incident light is reflected as test light; a first optical element disposed on an optical path of the incident light, having at least one surface with a hologram for diffracting the incident light toward the test piece; and a second optical element disposed after the first optical element, which transmits the incident light toward the aspheric surface and has a concave surface to reduce an incident angle of the test light entering the hologram after having been reflected from the aspheric surface. Alternatively, a single optical element with a hologram and a concave surface can be used instead of the separate first and second optical elements. An extremely aspheric lens can be precisely measured using the apparatus.

REFERENCES:
patent: 4396289 (1983-08-01), Fantone
patent: 4696572 (1987-09-01), Ono
patent: 4812042 (1989-03-01), Yokokura et al.
patent: 5039223 (1991-08-01), Gemma et al.
patent: 5530547 (1996-06-01), Arnold
patent: 5737079 (1998-04-01), Burge et al.
patent: 6714308 (2004-03-01), Evans et al.
patent: 6781700 (2004-08-01), Kuchel
Kobayashi, Kosei JP 363223538A, Mar. 13, 1987.
Zygo® GPI XP™ and GPI XPHR™ Specifications.
Zygo® product description.
Zygo® Transmission Sphere Selection.

Affiliated with

Also associated with

Rating

Apparatus for and method of measurement of aspheric surfaces... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for and method of measurement of aspheric surfaces..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for and method of measurement of aspheric surfaces... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3558488