Illuminance calibrating method of illuminator, illuminance...

Details Illuminance calibrating method of illuminator, illuminance... Illuminance calibrating method of illuminator, illuminance...

2006-03-21

2006-03-21

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controls its own optical systems

C315S151000, C315S158000

Reexamination Certificate

active

07015447

ABSTRACT:
An illuminance calibrating method includes a light-receiving intensity measuring step (ST100) for measuring a relationship between an applied current value and a light-receiving intensity of a CCD camera of which exposure time is capable of being changed by taking an image of an illumination from an illuminator by the CCD camera while changing the exposure time of the CCD camera, a characteristic curve calculating step (ST200) for calculating a characteristic curve of the illumination intensity of the illuminator and the applied current value based on the result obtained in the light-receiving intensity measuring step (ST100), and a command-value/current-value table generating step (ST300) for generating a table of the command value and the applied current value based on the calculated characteristic curve.

REFERENCES:
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patent: 5220840 (1993-06-01), Neigoff et al.
patent: 5514864 (1996-05-01), Mu-Tung et al.
patent: 5828178 (1998-10-01), York et al.
patent: 6239554 (2001-05-01), Tessadro et al.
patent: 6303916 (2001-10-01), Gladnick
patent: 6303917 (2001-10-01), Hawryluk
patent: 2002/0014864 (2002-02-01), Gemunder et al.

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