PHOTOMETRY EQUIPMENT FOR CAMERA
Document Type and Number:
Japanese Patent JP3456215
PURPOSE: To obtain the charge storage time so as to obtain an optimum exposure value at a CCD.
CONSTITUTION: A luminous flux passing through an image pickup lens 1 reaches a light receiving element 9 via a main mirror 2: a diffusion screen 3, a penta prism 4, a photometry lens 6. The light receiving element 9 outputs a voltage proportional to the received light intensity and a storage time operation section 11 adjusts an output voltage to an optimum level.
August 01, 2003
July 06, 1992
G03B7/091; G03B7/099; G03B7/28; H04N5/235; (IPC1-7): H04N5/235; G03B7/091; G03B7/28