Arrangement for checking dimensional accuracy

Details Arrangement for checking dimensional accuracy Arrangement for checking dimensional accuracy

1983-09-30

1985-01-08

Punter, William H.

Optics: measuring and testing

By polarized light examination

With light attenuation

350382, 350396, 356 10, G01B 1114, G01C 302, G02B 512, G02F 119

Patent

active

044924712

ABSTRACT:
An arrangement for checking the dimensional accuracy and/or measuring the dimensions of large objects (1), such as car bodies or the like, where the object is provided with checking points such as bolt heads, suspended measuring rods (2-7). At least one movement path is erected beside the object. Provided on each movement path is at least one transmission unit arranged to move along the path which emits a narrow light beam at an angle to the path. At least two light beams are emitted simultaneously from different starting points towards each checking point. In order to make it possible to clearly detect that both light beams impinge on precisely the same point, the light beams are modulated in different phase positions with a modulation frequency which causes the light upon impingement on one point with only one light beam to be interpreted by the eye as flashing. On the other hand, light at the point of impingement is interpreted as steady if light from both light beams impinge on the point.

REFERENCES:
patent: 441975 (1890-12-01), Rapieff
patent: 2390652 (1945-12-01), Ives
patent: 3397608 (1968-08-01), Ellis
patent: 3433139 (1969-03-01), Beyan et al.
patent: 3710798 (1973-01-01), Bredemeier
patent: 3765764 (1973-10-01), Niss
Labrunie et al., "Nematic Liquid Crystal Digital Light Deflector", App. Optics, 8-1974, pp. 1802-1806.

Affiliated with

Also associated with

Rating

Arrangement for checking dimensional accuracy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for checking dimensional accuracy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for checking dimensional accuracy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-111864