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Patent Searching and Data


Title:
SHORT DISTANCE CORRECTION LENS EQUIPPED WITH VIBRATIONPROOF FUNCTION
Document Type and Number:
Japanese Patent JPH07261126
Kind Code:
A
Abstract:

PURPOSE: To provide a short distance correction lens which is equipped with the vibrationproof function, small-sized and high in performance, and suitable for photographs, videos, etc.

CONSTITUTION: The short distance correction lens equipped with the vibrtionproof function is equipped with a 1st lens group G1 with positive refractive power and a 2nd lens group G2 with positive refractive power on the object side in order from the object side, and also equipped with a final lens group GL with negative refractive power on the most image side, and, this short distance correction lens, which is focused on a short-distance body from the infinite distance side by moving the 1st lens group G1 and 2nd lens group G2 toward the body, is equipped with a displacing means which isolates vibration by moving some partial lens group GLP with negative refractive power in the final lens group GL in the direction almost at a right angle to the optical axis, and meets a condition of 0.25<βM, where βM is the photographic power at the shortest photographic distance.


Inventors:
SUZUKI KENZABURO
Application Number:
JP7443994A
Publication Date:
October 13, 1995
Filing Date:
March 18, 1994
Export Citation:
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Assignee:
NIKON CORP
International Classes:
G02B9/64; G02B13/00; G02B27/64; (IPC1-7): G02B27/64; G02B9/64
Attorney, Agent or Firm:
Takao Yamaguchi