Camera lens for projector

A projector and lens technology, applied in the field of optical lenses, can solve the problems of multi-lens, high cost, and large volume, and achieve the effects of enhanced transmittance, increased brightness, and high resolution

Inactive Publication Date: 2009-11-18
BYD SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] EP058651B1 and US5,644,435 respectively disclose a zoom lens for small projectors, but if this type of l

Method used

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  • Camera lens for projector
  • Camera lens for projector
  • Camera lens for projector

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Embodiment Construction

[0019] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0020] Such as figure 1 , 6 The shown projector lens includes a first lens 1 , a second lens 2 , a third lens 3 , a fourth lens 4 and a fifth lens 5 in sequence from the object side to the image side. The lenses 1-5 are all spherical mirrors, and all of them are made of glass.

[0021] The first lens 1 is a meniscus lens concave to the image side, which has a first spherical surface R1 and a second spherical surface R2, wherein the first spherical surface R1 of the first lens 1 is the first contact surface of light. The second lens 2 is a meniscus lens concave toward the image side, which has a ...

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Abstract

The invention is suitable for the field of optical lens, and aims to provide a camera lens for a projector, comprising a first lens, a second lens, a third lens, a fourth lens and a fifth lens sequentially arranged from an object direction to an image direction. The lens adopts glass and is a spherical lens; the first lens and the second lens are falcate lenses concave to the image direction; a lens protruding to the image direction is formed by adhering the third lens and the fourth lens together; and the fifth lens is a biconvex lens. Because the lens of the camera lens for the projector totally adopts a spherical design, various phase differences can be corrected through optimizing spherical coefficients such as spherical radius of curvature, intervals between lenses and thickness of the lenses so as to ensure that the camera lens for the projector reaches the demand of imaging quality. In addition, the lens made of glass can improve brightness and strengthen the light transmittance so as to obtain favorable imaging quality, reach the requirement of high resolution and small volume and reduce cost of the camera lens for the projector.

Description

technical field [0001] The invention belongs to the field of optical lenses, in particular to a miniature projector lens that can be used in conjunction with portable electronic devices. Background technique [0002] A projector generally includes a lens and an LCD (liquid crystal display) chip. LCD projectors have better color reproduction and a resolution up to SXGA (Super Extended Graphics Array) standard of 1.3 million pixels. In addition, LCD projectors are small in size, light in weight, and easy to carry. They are mainstream products in the projector market. [0003] In the field of developing micro-projectors, LCD micro-display chips have bottlenecks in miniaturization, low energy consumption and cost reduction, and it is difficult to have pioneering development; in contrast, F-LCOS (Ferroelectric Liquid Crystal on Silicon ferroelectric liquid crystal silicon) technology, with smaller size and low power consumption, provides the possibility for smaller projection p...

Claims

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Application Information

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IPC IPC(8): G02B13/00G02B1/02
Inventor 姜莉莉
Owner BYD SEMICON CO LTD
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