Measurement of the curvature of a surface using parallel light beams
Abstract
Apparatus is disclosed for measuring curvature of a surface wherein a beam of collimated light is passed through a means for producing a plurality of parallel light beams each separated by a common distance which then reflect off the surface to fall upon a detector that measures the separation of the reflected beams of light. This means can be an etalon and the combination of a diffractive element and a converging lens. The curvature of the surface along the line onto which the multiple beams fall can be calculated from this information. A two-dimensional map of the curvature can be obtained by adding a second etalon (or a second combination of a diffractive element and a converging lens) which is rotated 90[degree] about the optical axis relative to the first etalon and inclined at the same angle. The second etalon creates an individual set of parallel light beams from each of the individual beams created by the first etalon with the sets of parallel light beams from the second etalon rotated 90[degree] relative to the line onto which the single set of parallel beams from the first etalon would have fallen. 5 figs.
- Inventors:
- Issue Date:
- Sponsoring Org.:
- USDOE; USDOE, Washington, DC (United States)
- OSTI Identifier:
- 6158933
- Patent Number(s):
- 5912738
- Application Number:
- PPN: US 8-756324
- Assignee:
- Sandia Corp., Albuquerque, NM (United States)
- DOE Contract Number:
- AC04-94AL85000
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 25 Nov 1996
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; DIMENSIONS; MEASURING INSTRUMENTS; MEASURING METHODS; OPTICAL SYSTEMS; SURFACES; VISIBLE RADIATION; ELECTROMAGNETIC RADIATION; RADIATIONS; 440600* - Optical Instrumentation- (1990-)
Citation Formats
Chason, E H, Floro, J A, Seager, C H, and Sinclair, M B. Measurement of the curvature of a surface using parallel light beams. United States: N. p., 1999.
Web.
Chason, E H, Floro, J A, Seager, C H, & Sinclair, M B. Measurement of the curvature of a surface using parallel light beams. United States.
Chason, E H, Floro, J A, Seager, C H, and Sinclair, M B. Tue .
"Measurement of the curvature of a surface using parallel light beams". United States.
@article{osti_6158933,
title = {Measurement of the curvature of a surface using parallel light beams},
author = {Chason, E H and Floro, J A and Seager, C H and Sinclair, M B},
abstractNote = {Apparatus is disclosed for measuring curvature of a surface wherein a beam of collimated light is passed through a means for producing a plurality of parallel light beams each separated by a common distance which then reflect off the surface to fall upon a detector that measures the separation of the reflected beams of light. This means can be an etalon and the combination of a diffractive element and a converging lens. The curvature of the surface along the line onto which the multiple beams fall can be calculated from this information. A two-dimensional map of the curvature can be obtained by adding a second etalon (or a second combination of a diffractive element and a converging lens) which is rotated 90[degree] about the optical axis relative to the first etalon and inclined at the same angle. The second etalon creates an individual set of parallel light beams from each of the individual beams created by the first etalon with the sets of parallel light beams from the second etalon rotated 90[degree] relative to the line onto which the single set of parallel beams from the first etalon would have fallen. 5 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Jun 15 00:00:00 EDT 1999},
month = {Tue Jun 15 00:00:00 EDT 1999}
}