Japan, Feb. 27 -- COSINA CO LTD has got intellectual property rights for 'LENS DEVICE.' Other related details are as follows:
Application Number: JP,2021-200364
Category (FI): G03B21/00@D,G02B15/20,G02B13/18,G02B13/16,G03B21/14@D
Stage: PROBLEM TO BE SOLVED: To reduce aberration related to field curvature, and reduce the entire lens device and further reduce costs without complicating a mechanism of the lens device.SOLUTION: A lens device comprises: a lens optical system 100 that has a first lens group G1 in which a first front lens group G1F and a first rear lens group G1R are arranged from an enlargement side E, and the first front lens group G1F includes an aspherical lens Ls having both aspherical lens surfaces, and which has negativ...