Apparatus for correcting trembling of a focused image

Details Apparatus for correcting trembling of a focused image Apparatus for correcting trembling of a focused image

1999-04-22

2000-05-16

Epps, Georgia

Optical: systems and elements

Lens

With variable magnification

359704, G02B 1514

Patent

active

060645326

ABSTRACT:
Binoculars are provided with correction lenses which correct a trembling of a focused image. The correction lenses are driven by stepping motors. The difference between an angular position data of optical axes of the binoculars and a driving amount of the correction lenses driven by the stepping motors is calculated. If the difference exceeds a positive threshold value, the stepping motor is rotated clockwise, and if the difference is below a negative threshold value, the stepping motor is rotated counterclockwise in order to cancel the difference. When the difference is between the positive threshold value and the negative threshold value, the stepping motor is not rotated. The threshold value is determined to be a quarter of the driving amount of the correction lenses, which corresponds to one rotational step of the stepping motor.

REFERENCES:
patent: 5461513 (1995-10-01), Maruyama
patent: 5754339 (1998-05-01), Kanai et al.

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