Optical design for laser encoder resolution extension and angula

Details Optical design for laser encoder resolution extension and angula Optical design for laser encoder resolution extension and angula

1997-07-29

1999-04-20

Hantis, K. P.

Optics: measuring and testing

By polarized light examination

With light attenuation

G01B 1114

Patent

active

058962000

ABSTRACT:
A laser Doppler encoder includes a set of prisms mounted on a fixed base along with an additional prism, an end retroreflector and a laser/detector and a second set of prisms mounted on a moving/rotating base. The laser/detector generates a laser beam that is transmitted through the sets of prisms on the fixed and moving bases as well as the additional prism and the end retroreflector until the laser beam finally reaches a heterodyning detector that is housed coaxially inside the laser/detector. The laser beam is a frequency-stabilized laser beam such that the laser beam that is reflected back to the heterodyning detector is frequency-shifted by the movement of the moving base relative to the fixed base so that the amount of movement (either rotational or linear) of the moving base can be accurately determined. Moreover, the end retroreflector enables the laser Doppler encoder to be readily self-aligned such that the alignment time is substantially reduced and the three-dimensional optical path configuration results in a compact and integrated optical design which optimizes the system's anti-vibration performance. The laser Doppler encoder can be used in conjunction with a high energy resolution monochromator for accurately determining the rotational movement of an arm in the monochromator or can be used in conjunction with a closed looped motion controller for providing feedback on the rotational displacement of the arm of the monochromator so that the arm can be accurately positioned.

REFERENCES:
patent: 4922307 (1990-05-01), Schaffer

Affiliated with

Also associated with

Rating

Optical design for laser encoder resolution extension and angula does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical design for laser encoder resolution extension and angula, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical design for laser encoder resolution extension and angula will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2251429