Title:
VARIABLE FOCAL LENGTH OBJECTIVE LENS FOR CREATING SPECIAL EFFECT ON FILM AND OPTICAL SYSTEM HAVING SAME LENS
Document Type and Number:
Japanese Patent JPS56133712
Kind Code:
A
Abstract:
A variable-focal-length objective for equipping optical printers and caption stands for the production of special effects on films is constituted by four groups of lenses, namely a first convergent group of four lenses, a second divergent group of four lenses, a third convergent group of six lenses, and a fourth convergent group of two lenses, the first and third groups being coupled together and movable.
Inventors:
KUROODO KATERAANI
KATORIINU PERISHIYON
KATORIINU PERISHIYON
Application Number:
JP2214781A
Publication Date:
October 20, 1981
Filing Date:
February 17, 1981
Export Citation:
Assignee:
KUROODO KATERAANI
KATORIINU PERISHIYON
KATORIINU PERISHIYON
International Classes:
B41B17/00; B41J2/44; G02B15/00; G02B15/15; G03B27/32; (IPC1-7): B41B21/16; B41J3/21; G02B15/14; G03B27/32