Title:
HYBRID REFRACTIVE/DIFFRACTIVE ACHROMATIC CAMERA LENS AND CAMERA USING SUCH
Document Type and Number:
WIPO Patent Application WO/1995/018393
Kind Code:
A1
Abstract:
A hybrid refractive and diffractive achromatic lens (10, 20, 30) suited for single-use or inexpensive single-lens cameras (100) operating in visible spectral range. The lens comprises a body of optically transmissive material having an index of refraction at a wavelength approximately at the center of said range of at least 1.45. The lens body having a first and second surface (1, 2) on opposite sides thereof, at least one of said surfaces (1, 1', 1"; 2, 2', 2") being curved to provide a refractive portion having power and introduces chromatic aberration, the lens (10, 20, 30) having a diffractive portion (3, 3', 3") having power which reduces the chromatic aberration introduced by the refractive portions.
Inventors:
MEYERS MARK MARSHALL
BIETRY JOSEPH RAYMOND
BIETRY JOSEPH RAYMOND
Application Number:
PCT/US1994/013896
Publication Date:
July 06, 1995
Filing Date:
December 05, 1994
Export Citation:
Assignee:
EASTMAN KODAK CO (US)
International Classes:
B23B27/20; G03C3/00; B29D11/00; G02B3/08; G02B5/18; G02B9/02; G02B13/18; G02B27/00; G03B17/04; (IPC1-7): G02B5/18
Foreign References:
| DE4110614A1 | 1992-10-08 | |||
| EP0441206A1 | 1991-08-14 | |||
| EP0367878A1 | 1990-05-16 | |||
| US5235464A | 1993-08-10 |
Other References:
See also references of EP 0737323A1
Download PDF:
Previous Patent: A METHOD OF MANUFACTURING A DIFFRACTIVE SURFACE PROFILE
Next Patent: OPTICAL POLARIZER WITH DIAMOND PLATES
Next Patent: OPTICAL POLARIZER WITH DIAMOND PLATES