The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 1992
Filed:
Mar. 15, 1991
Yasushi Watase, Hamamatsu, JP;
Toshio Ikuma, Hamamatsu, JP;
Hamamatsu Photonics K.K., Shizuoka, JP;
Abstract
A proximity image intensifier for use in a light amplifier in a high-sensitivity hand-held camera for broadcasting service or the like, which includes a photocathode for photoelectrically converting an optical image, a phosphor screen for receiving photoelectrons from the photocathode and producing an intensified optical image, and a high-voltage power supply for applying a high voltage across the photocathode and the phosphor screen. For protecting the phosphor screen from burnout due to a spot of incident light, a resistor is interposed in a power supply path at a position immediately before at least one of the photocathode and the phosphor screen to reduce an electrostatic capacitance between the photocathode and the phosphor screen.