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:
Oct. 06, 1981
Filed:
Dec. 06, 1978
Robert Bosch GmbH, Stuttgart, DE;
Abstract
An image converter is disclosed which can be operated by means of a relatively low voltage D.C. supply. In this invention, the luminescent screen of the image converter is brought closer to the photocathode by forming the exit window with a frustrum-shaped platform with a top surface that is parallel to the entrance window, and upon which top surface the luminescent screen is mounted. As a result of the closer spacing between the photocathode and the luminescent screen, lower D.C. supply voltages can be utilized. Moreover, the shape of the housing which supports the two windows at the image converter is so designed that the interior surface of the housing is non-perpendicular to the equipotential lines of the electric field which is established between the photocathode and the luminescent screen. As a result of this geometrical relationship, avalanche discharge is reduced or eliminated altogether, thereby reducing or eliminating the undesirable arcing which can occur as a result of such avalanche discharge. Embodiments are taught for amplification of projected images in the visible portion of the electromagnetic spectrum, along with embodiments which can be utilized to form images of radioactive radiation, X-ray radiation and ultraviolet radiation.