公开(公告)号：JPH01101502A

公开(公告)日：1989-04-19

申请号：JP25928087

申请日：1987-10-14

Applicant: AGENCY IND SCIENCE TECHN

Inventor： KIKUCHI KEISUKE ,  HIRANO MASAHIRO ,  YAJIMA HIROYOSHI

IPC: G02B3/00

Abstract: PURPOSE:To reduce spherical aberration and coma aberration, to remove an air layer and to easily produce the title lens by sandwiching a uniform sphere between two planes so that the sphere is tightly brought into contact with the recessed spherical faces of faces formed between the two planes and correcting the spherical aberration and coma aberration of an optical system based on changes in the refractive indexes of the planes. CONSTITUTION:The recessed spherical holes 4A, 4B are formed on the surfaces of the planes 2A, 2B changing their refractive indexes at least near the surfaces in the thickness direction, the uniform sphere 1 is sandwiched between the two planes 2A, 2B so as to be tightly brought into contact with the recessed spherical faces of the holes and changes in the refractive indexes of the planes 2A, 2B are used as values for correcting the spherical aberration of the optical system and a sine condition. Even if an oblique axis is used, structure having a small aberration and tightly united between spherical lenses with another optical element without forming an air layer can be obtained, so that a device using the spherical lens as its element can be characterized with low loss, high performance and multifunction and tolerance in production or assembling can be loosened.