# US 7,609,316 B2 · Optical viewfinder system of camera

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- Number: US 7,609,316 B2
- Document ID: US7609316B2
- Status: Granted
- Kind: B2
- Application number: 11/411,654
- Filed: 2006-04-26
- Published: 2007-03-01
- Granted: 2009-10-27
- Earliest claimed: 2005-08-23
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Inventors: Yang-Chang Chien
- Web page: https://patentgrep.com/patent/US7609316B2

## CPC

- G03B 13/06: with lenses with or without reflectors
- G03B 17/17: with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
- G03B 29/00: Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects (combinations with flash apparatus G03B15/03)
- G03B 2217/007: Details of energy supply or management
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)

## Abstract

An optical viewfinder system includes: a lens element group (22), a beam splitter (30) and a window (40). The beam splitter is disposed behind the lens group. The window located behind the beam splitter, the lens element group and the beam splitter being located on a line with the window. The optical viewfinder system provides a better quality and power saving for a portable electronic device.

## Claims

### Claim 1

A digital camera module comprising:
a main body being a hollow cylinder having a longitudinal body axis, and including a first end and a second end;
a barrel being fixed on an inner wall of the first end and having a longitudinal barrel axis;
a lens element group received in the barrel and having a longitudinal lens axis; the body, barrel, and lens axes being parallel, wherein light passing through the lens element group is focused by the lens element group;
a beam splitter received in the main body and located behind the lens element group and for receiving a focused light;
a window positioned in line with the lens and the beam splitter; and
an image sensor positioned at a location where the focused light reflected towards the image sensor is not reflected or refracted in the distance between the beam splitter and the image sensor;
wherein the focused light contacting the beam splitter is directed in a first direction towards the window and a second direction towards the image sensor within the digital camera module.

### Claim 2 (depends on 1)

The digital camera module as claimed in claim 1, wherein the beam splitter reflects 50% of incident light, and transmits 50% of incident light.

### Claim 3 (depends on 1)

The digital camera module as claimed in claim 1, wherein the window is a glass board, the glass board being located before the lens element group and covering one end of the main body.

### Claim 4 (depends on 1)

The digital camera module as claimed in claim 1, wherein the main body has a first hole and a second hole defined therein, the first hole is aligned with the second hole, and the window is disposed at the second hole.

### Claim 5 (depends on 1)

The digital camera module as claimed in claim 1, wherein the image sensor is positioned on the main body.