Recorders – Combined with non-recording indicator or alarm
Patent
1977-10-14
1978-11-14
Hartary, Joseph W.
Recorders
Combined with non-recording indicator or alarm
346 76L, 350152, 350157, 350173, 353 20, G01D 932, G01D 702
Patent
active
041258436
ABSTRACT:
A single projector and a laser radiation deflecting means enable laser generated images to be projected onto a screen together with a laser pointer. A first laser beam polarized in a first plane and a second laser beam polarized in a second plane is projected into a polarizer cube wherein the first laser beam is reflected to a record medium to record images thereon and the second laser beam is transmitted through the polarizer cube. Polarization and deflecting means located in the path of the transmitted second laser beam changes the polarization of the second laser beam to the polarization of the first laser beam and reflects the second laser beam back into the polarizer cube wherein the second laser beam is reflected in a direction opposite to that of the first laser beam to enable the second laser beam to function as a pointer. By backlighting the record medium with illumination radiation polarized in the second plane, the images recorded on the record medium can be projected onto a screen together with the laser pointer. Illumination radiation polarized in the second plane is obtained from unpolarized illumination by focusing the unpolarized illumination radiation into a polarizer cube to convert the single beam of unpolarized radiation into a first beam of radiation polarized in the second plane and a second beam of radiation polarized in the first plane. By changing the polarization of the second beam of radiation to polarization in the second plane, both the first and second beams of polarized, illumination radiation can be utilized to backlight the record medium to project the image(s) recorded therein.
REFERENCES:
patent: 3753608 (1973-08-01), Bernal, Jr.
patent: 3961334 (1976-06-01), Whitby
Hartary Joseph W.
Lewis Charles R.
The Singer Company
LandOfFree
Method and apparatus for recording and projecting images does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for recording and projecting images, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for recording and projecting images will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1304925