Optics: measuring and testing – By shade or color
Patent
1988-09-13
1990-02-27
McGraw, Vincent P.
Optics: measuring and testing
By shade or color
250226, 356243, G01J 350
Patent
active
049040880
ABSTRACT:
A rapid and simple opto-electronic measuring method of determining the wavelength and the wavelength-corrected power of monochromatic light sources is indicated. The photodetectors (1, 2) of different spectral overall sensitivity are acted upon through a transfer device by the flow of radiation of the light source to be measured, and the signals (I1, I2) then produced are supplied through a unit (3) for acquisitioning and processing the measurement values to a calculation unit (4). From the signals (I1, I2) a wavelength-specific quantity is derived in the calculation unit which is compared with the wavelength-specific data present in memory unit (6) after one calibration. Thus, the actual wavelength of the light source to be measured can be determined, be indicated by an indicator unit (7), or be supplied through a data interface. When the actual wavelength is known, a wavelengh-specific correction factor can be interrogated in the memory unit, and a wavelength-corrected power can be calculated in the calculation unit. FOr actuation of the photodetectors (1, 2), a radiation splitter, light wave guides with corresponding connection members of Ulbricht balls can be used.
REFERENCES:
patent: 4057146 (1977-11-01), Castaneda et al.
patent: 4308456 (1981-12-01), Van Der Gaag et al.
patent: 4309604 (1982-01-01), Yoshikawa et al.
Blazek Vladimir
Seidenberg Jurgen
McGraw Vincent P.
Miller Paul R.
U.S. Philips Corporation
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