Television – Camera – system and detail – Optics
Reexamination Certificate
1998-06-19
2002-07-16
Vu, Ngoc-Yen (Department: 2612)
Television
Camera, system and detail
Optics
C348S351000, C348S357000, C348S368000, C348S374000, C396S132000, C396S463000
Reexamination Certificate
active
06421088
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a digital camera, and more particularly, to a digital camera with an adjusting device coupled with the lens and irises of a digital camera.
2. Description of the Prior Art
Please refer to FIG.
1
.
FIG. 1
is a component diagram of a prior art digital camera
10
. The digital camera
10
comprises a housing
12
with a lens holder
14
and a protruding axle
16
installed on it for mounting components for focusing the digital camera
10
.
The digital camera
10
further comprises a lens
22
movably mounted on the lens holder
14
along a front-and-rear direction, a spring
28
installed between the lens
22
and the lens holder
14
for fixing the lens
22
so as to allow movement of the lens
22
, a gear wheel
18
rotatably installed on the lens holder
14
and connected with the lens
22
for driving the lens
22
, a driving wheel
30
installed on the protruding axle
16
for driving the lens
22
with the gear wheel
18
and adjusting the focus, and a screw
32
for rotatably fixing the driving wheel
30
to the protruding axle
16
. The focusing of the digital camera
10
is accomplished by using an actuating device (not shown) to activate the driving wheel
30
and gear wheel
18
and to move the lens
22
along the front-and-rear direction, or by manually adjusting the driving wheel
30
for driving the gear wheel
18
and the lens
22
.
The digital camera
10
further comprises a magnetic switch (not shown) and a driving device (not shown) for switching holes of the digital camera
10
. Because the lens
22
and the holes are separately controlled, the digital camera
10
is costly to produce, oversized and has many components and electronic parts with complex installation procedures.
SUMMARY OF THE INVENTION
It is therefore a primary objective of the present invention to provide a digital camera to solve the above mentioned problems.
In a preferred embodiment, the present invention provides a digital camera comprising:
a housing with a front opening installed at its front end for receiving incident light;
a sensor installed at a rear end of the housing for recording the incident light;
an iris strip moveably installed in the housing having a plurality of irises of different sizes for adjusting the amount of the incident light emitted to the sensor;
a lens moveably installed in the housing for concentrating the incident light onto the sensor;
an adjusting device rotatably installed in the housing for adjusting the positions of the lens and the iris strip;
wherein the adjusting device can be rotated to move the lens to a plurality of lens positions to change the distance between the lens and the sensor, and at each lens position, the adjusting device can also be rotated to move each of the irises on the iris strip to a position on the front opening of the housing and the sensor so as to adjust the amount of the incident light emitted to the sensor.
It is an advantage of the present invention that the digital camera only requires an actuating device for rotating the adjusting device, changing the lens and iris strip position, focusing the image, and adjusting the light emitted to the sensor. Thus, the digital camera has a simpler structure, more compact size, and lower production cost.
REFERENCES:
patent: 4346972 (1982-08-01), Takahashi
patent: 4506966 (1985-03-01), Kuge
patent: 4695144 (1987-09-01), Yoshino
patent: 4918480 (1990-04-01), Hori
patent: 4924317 (1990-05-01), Hirao
patent: 5138355 (1992-08-01), Morisawa
patent: 5258797 (1993-11-01), Oyoshi
patent: 5313244 (1994-05-01), Arai
patent: 5978602 (1999-11-01), Toyofuku
Hsu Winston
Mustek Systems Inc.
Vu Ngoc-Yen
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