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Lens of digital camera

A digital camera and lens technology, applied in the field of digital camera lenses, can solve the problems of increased lens weight, poor impact resistance, small lens size, etc., to avoid spherical aberration, reduce processing costs, and improve imaging quality.

Inactive Publication Date: 2009-09-23
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

After adopting the above structure, the size of the lens is small, and the lens is made of spherical glass lens. Although the processing is easy, the material is made of glass, which increases the weight of the lens, and the use of glass material makes the impact resistance poor. When dropped on the ground, the lens is easily damaged. In addition, the application of spherical lenses inevitably brings spherical aberration, which affects imaging performance

Method used

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Embodiment Construction

[0014] See figure 1 , digital camera lens of the present invention comprises a diaphragm 1 successively from object side to image side, a first lens 2, a second lens 3, a third lens 4, a fourth lens 5, a glass plate 6 and image sensor Measuring element 7. The line O represents the optical axis of the lens, Z obj represents the object space, Z img On behalf of the image side, the diaphragm 1 at the object side of the lens is first exposed to light when in use.

[0015] The aperture 1 includes an aperture surface 12 placed in front of the first lens 2 , which can directly control the amount of incoming light by using the aperture size of the aperture 1 .

[0016] The first lens 2 is a double-convex double-sided aspheric positive lens, including a first aspheric surface 22 and a second aspheric surface 24 . The second lens 3 is a biconcave double-sided aspheric negative lens, including a third aspheric surface 32 and a fourth aspheric surface 34 . The third lens 4 is a conve...

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Abstract

A digital camera lens, which comprises sequentially from the object side to the image side: a first lens, a second lens, a third lens and a fourth lens. The first lens is a double-convex double-sided aspheric positive lens, including a first aspheric surface and a second aspheric surface, and the second lens is a double-concave double-sided aspheric negative lens, including a third aspheric surface and a fourth aspheric surface. The lens is a convex-concave double-sided aspheric positive lens, including the fifth aspheric surface and the sixth aspheric surface, and the fourth lens is a double-sided aspheric positive lens with a wave-shaped surface, including the seventh aspheric surface and the eighth aspheric surface; its material They are all made of plastic; the present invention adopts an aspheric design to simplify the structure and improve the imaging quality; in addition, it is made of plastic, which is light in weight and enhances its impact resistance.

Description

【Technical field】 [0001] The invention relates to a digital camera lens, in particular to a digital camera lens which can be used in conjunction with a portable electronic device. 【Background technique】 [0002] Digital camera lens is an important component in a digital camera. The lens determines the quality of imaging performance. Therefore, lens performance has become an important consideration in camera design. At the same time, with the combination of digital camera lenses and portable electronic devices such as mobile phones in recent years, The size and weight of the lens have also become important factors considered by the industry. [0003] Digital camera lenses usually consist of multiple elements in order to correct for optical aberrations. Spherical lenses are used in digital camera lenses. Spherical lenses inevitably bring about spherical aberration. To correct spherical aberration, it is necessary to increase the number of lenses, thereby increasing the size o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B9/36G02B13/18H04N5/225
CPCG02B9/34G02B13/0055G02B13/004
Inventor 李俊佑蔡明江江宗韦
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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