OPTICAL ELEMENT

PURPOSE:To obtain a variable focus lens of simple constitution which has large variation in focal length by projecting or recessing a volume type elastic body itself from the opening of a member in a convex or concave shape, and deforming the optical surface formed of the elastic body at the opening...

Full description

Saved in:
Bibliographic Details
Main Authors USUI MASAYUKI, BABA TAKESHI, IMATAKI HIROYUKI, NOSE HIROYASU, SERIZAWA TAKASHI
Format Patent
LanguageEnglish
Published 13.05.1985
Subjects
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:PURPOSE:To obtain a variable focus lens of simple constitution which has large variation in focal length by projecting or recessing a volume type elastic body itself from the opening of a member in a convex or concave shape, and deforming the optical surface formed of the elastic body at the opening part. CONSTITUTION:The transparent elastic body is provided in the cylindrical container 1 having the circular opening part 2. When pressure is applied to the elastic body 3 through an optically transparent parallel flat plate 4, part of the elastic body 3 projected from the opening part in a convex lens shape according to the value of the pressure. Further, when negative pressure is applied to the elastic body 3 through the flat plate 4, the elastic body 3 deforms in a concave lens shape at the opening part. This elastic body uses material with high elasticity and rubber elasticity. Namely, natural rubber and synthetic rubber, e.g. styrene-butadiene rubber, butadiene rubber, etc., are usable. Further, variation in volume by heating may be utilized for the deformation in addition to said pressure.
Bibliography:Application Number: JP19830193868