US 11,967,480 B2
Image intensifier device with power supply disposed upstream of the photocathode
Nicolas Laurent, Brive la Gaillarde (FR); Jorge De La Torre Noetzel, Madrid (ES); Diego Rodriguez-Perez, Madrid (ES); and David Fernandez Gutierrez, Madrid (ES)
Assigned to PHOTONIS FRANCE, Brive la Gaillarde (FR)
Appl. No. 18/263,790
Filed by PHOTONIS FRANCE, Brive la Gaillarde (FR)
PCT Filed Jan. 31, 2022, PCT No. PCT/FR2022/050167
§ 371(c)(1), (2) Date Aug. 1, 2023,
PCT Pub. No. WO2022/167749, PCT Pub. Date Aug. 11, 2022.
Claims priority of application No. 2100975 (FR), filed on Feb. 2, 2021.
Prior Publication US 2024/0105413 A1, Mar. 28, 2024
Int. Cl. H01J 31/50 (2006.01); G02B 6/06 (2006.01); G02B 23/12 (2006.01); G02B 25/00 (2006.01); H01J 29/04 (2006.01)
CPC H01J 31/507 (2013.01) [G02B 6/06 (2013.01); G02B 23/12 (2013.01); G02B 25/001 (2013.01); H01J 29/04 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An image intensifier device comprising an intensifier tube and an electric power supply module, wherein the intensifier tube includes:
at least one photocathode, configured to convert an incident photon beam into an initial electron beam;
a micro-channel plate, configured, in use, to generate a plurality of secondary electrons in response to the reception of an incident electron, and configured to receive said initial electron beam and to generate in response an intensified electron beam; and
a conversion element, configured to receive the intensified electron beam and to emit in response an intensified photon beam, with the micro-channel plate located between the photocathode and the conversion element;
a first set of lenses, called objective, configured to optically conjugate a focusing surface located outside the intensifier tube, and an initial image forming surface located inside or at the input of the intensifier tube;
the electric power supply module being configured to supply at least one respective biasing voltage, to each of the photocathode, the micro-channel plate, and the conversion;
wherein the electric power supply module extends in a region located entirely upstream of the photocathode, on the side of the photocathode opposite to the micro-channel plate, at the periphery of the objective.