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Lens Assembly for Camera

a technology for lenses and cameras, applied in the field of camera lenses, can solve the problems of high cost of camera lenses, inability to shorten the total distance of camera lenses to the desired level, etc., and achieve the effects of reducing optical distortion, compact size, and simple structur

Inactive Publication Date: 2005-02-03
GENIUS ELECTRONICS OPTICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003] The present invention has been accomplished to provide a lens assembly, which has a simple structure and compact size. The arrangement of the lens unit greatly reduces the optical distortion, improving the image quality.

Problems solved by technology

Because the aperture is spaced between two lenses, the total distance of the camera lens cannot be shorted to the desired level.
Furthermore, because a big number of lenses are used, the cost of the camera lens is high.

Method used

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Embodiment Construction

FIELD OF THE INVENTION

[0001] The present invention relates to a camera lens for a camera of fixed focal length and, more specifically, to a lens assembly for use in a digital still camera or PC camera.

BACKGROUND OF THE INVENTION

[0002] Following fast development of personal computer technology, a variety of digital still cameras (DSC) have been disclosed for use with personal computers, and intensively used in families. A regular digital still camera uses a solid state image pickup device such as, charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS), to pick up the image of an object, enabling the image thus obtained to be transferred through a data line to a personal computer, which uses a software program to convert the image into a JPEG, GIF (graphics interchange format), or TIFF (tagged image file format) file. In order to meet the tendency of the designing of digital still cameras toward microminiaturization, matching solid-state image pickup devices and...

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PUM

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Abstract

Abstract of the DisclosureA lens assembly, which is mounted on a digital still camera (DSC), comprises a fixed aperture, and a lens unit. The lens unit has a first lens, a second lens, a third lens, a fourth lens and a fifth lens in sequence. The first lens is a biconvex lens disposed at the front side of the lens unit. The second lens is a biconcave lens. The third lens is a positive lens with having a larger curvature radius facing the objective side. The fourth lens is a negative meniscus lens. The fifth lens is a positive lens with a surface having a larger curvature radius facing the image side. The fourth lens and the fifth lens are attached together to form a compound lens. The aperture is disposed in front of the first lens.

Description

Detailed Description of the InventionFIELD OF THE INVENTION[0001] The present invention relates to a camera lens for a camera of fixed focal length and, more specifically, to a lens assembly for use in a digital still camera or PC camera.BACKGROUND OF THE INVENTION[0002] Following fast development of personal computer technology, a variety of digital still cameras (DSC) have been disclosed for use with personal computers, and intensively used in families. A regular digital still camera uses a solid state image pickup device such as, charge-coupled device (CCD) or complementary metal-oxide semiconductor (CMOS), to pick up the image of an object, enabling the image thus obtained to be transferred through a data line to a personal computer, which uses a software program to convert the image into a JPEG, GIF (graphics interchange format), or TIFF (tagged image file format) file. In order to meet the tendency of the designing of digital still cameras toward microminiaturization, matching...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02B13/04
CPCG02B13/04
Inventor CHEN, TIEN-CHING
Owner GENIUS ELECTRONICS OPTICAL CO LTD
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