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Title: Front lighted optical tooling method and apparatus

Abstract

An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial mark, such as cross hairs, reflecting polarized light with a first polarization, a polarizing element backing the fiducial mark and a reflective surface backing the polarizing element for reflecting polarized light bypassing the fiducial mark and traveling through the polarizing element. The light reflected by the reflecting surface is directed through a second pass of the polarizing element toward the frontal direction with a polarization differing from the polarization of the light reflected by the fiducial mark. When used as a tooling target, the optical assembly may be mounted directly to a reference surface or may be secured in a mounting, such as a magnetic mounting. The optical assembly may also be mounted in a plane defining structure and used as a spherometer in conjunction with an optical depth measuring instrument.

Inventors:
Issue Date:
OSTI Identifier:
6829627
Application Number:
ON: DE84011108
Assignee:
Dept. of Energy ERA-09-029049; EDB-84-093825
DOE Contract Number:  
AC04-76DP00613
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; OPTICAL EQUIPMENT; MEASURING INSTRUMENTS; TOOLS; LIGHT TRANSMISSION; OPTICAL DEPTH CURVE; OPTICAL SYSTEMS; POLARIZATION; DIAGRAMS; EQUIPMENT 420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)

Citation Formats

Stone, W.J. Front lighted optical tooling method and apparatus. United States: N. p., 1983. Web.
Stone, W.J. Front lighted optical tooling method and apparatus. United States.
Stone, W.J. Thu . "Front lighted optical tooling method and apparatus". United States.
@article{osti_6829627,
title = {Front lighted optical tooling method and apparatus},
author = {Stone, W.J.},
abstractNote = {An optical tooling method and apparatus uses a front lighted shadowgraphic technique to enhance visual contrast of reflected light. The apparatus includes an optical assembly including a fiducial mark, such as cross hairs, reflecting polarized light with a first polarization, a polarizing element backing the fiducial mark and a reflective surface backing the polarizing element for reflecting polarized light bypassing the fiducial mark and traveling through the polarizing element. The light reflected by the reflecting surface is directed through a second pass of the polarizing element toward the frontal direction with a polarization differing from the polarization of the light reflected by the fiducial mark. When used as a tooling target, the optical assembly may be mounted directly to a reference surface or may be secured in a mounting, such as a magnetic mounting. The optical assembly may also be mounted in a plane defining structure and used as a spherometer in conjunction with an optical depth measuring instrument.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1983},
month = {6}
}