Optical: systems and elements – Lens – With variable magnification
Reexamination Certificate
2000-02-28
2001-10-16
Mack, Ricky (Department: 2873)
Optical: systems and elements
Lens
With variable magnification
C359S704000
Reexamination Certificate
active
06304390
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a lens housing having an aperture device. Particularly, the invention relates to a structure of a lens housing having an aperture device for limiting the amount of light or unnecessary light that is incident on an optical element.
2. Description of the Related Art
There are conventional types of lens housings that include apertures (aperture device). One example is a lens housing having an aperture to allow the light to pass, which is adhered to a lens-supporting frame (lens frame) or the like by use of an adhesive. In another example, the lens frame is not used, but a lens member is built into the lens housing. In this type, an aperture member is fitted to the lens member via an aperture-installation member dedicatedly provided for installation of the aperture member to the lens member.
In the described example where the aperture member is adhered to the lens member with an adhesive, the adhesive sometimes extends in a line state during adhesion, thereby causing adverse effects on the lens function. In the described example where the dedicated aperture-installation member is used, the number of components is increased, thereby providing disadvantages in cost and miniaturization.
SUMMARY OF THE INVENTION
In order to solve the problems described above, an object of the present invention is to provide a lens housing having an aperture device that allows reduction in the number of configuration components and in the occupied space, thereby providing advantages in cost reduction and miniaturization.
A lens housing of the present invention having an aperture device includes a moving frame, cam followers, and an aperture member having an aperture surface. In this, the aperture member is fitted to the moving frame such that engagement sections extending from the aperture surface are engaged with the cam followers, thereby moving backward and forward together with the moving frame.
Other characteristics and advantages of the present invention will be further illustrated in the description provided below.
REFERENCES:
patent: 5583595 (1996-12-01), Hara et al.
patent: 5668670 (1997-09-01), Nakayama et al.
patent: 10-90579 (1998-04-01), None
Mack Ricky
Olympus Optical Co,. Ltd.
Ostrolenk Faber Gerb & Soffen, LLP
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