Optics: measuring and testing – Lens or reflective image former testing – For optical transfer function
Patent
1980-03-06
1982-05-11
Corbin, John K.
Optics: measuring and testing
Lens or reflective image former testing
For optical transfer function
250208, G01B 900, H01J 4014
Patent
active
043290493
ABSTRACT:
A lensmeter is disclosed for determining the refractive properties of a test lens, including an optical system to produce an ellipse of light at a detecting plane having information of such properties, a scanning linear photodiode array at the detecting plane for producing video output signals, a first integrator to integrate the video output signal from each photodiode, a compensator to compensate each video output signal for the light sensitivity of each photodiode, a second integrator to integrate the compensated video signals over the range of the distribution of light of an area of the ellipse being scanned, a circuit, connected to the second integrator, to detect the median point of the distribution, and a microprocessor to provide data identifying the median point in response to the detection.
REFERENCES:
patent: 3880525 (1975-04-01), Johnson
patent: 3922093 (1975-11-01), Dandliker et al.
patent: 4093866 (1978-06-01), Kasdan et al.
patent: 4145721 (1979-03-01), Beaudouin et al.
Cornsweet Tom N.
Ogle H. Malcolm
Prunella Wallace R.
Rigg George P.
Rough J. Kirkwood H.
Arnold Bruce Y.
Corbin John K.
Rodenstock Instruments Corporation
LandOfFree
Median point detecting apparatus for a lensmeter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Median point detecting apparatus for a lensmeter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Median point detecting apparatus for a lensmeter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-753897