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Infrared lens

An infrared lens and lens technology, applied in the field of infrared lens, can solve the problems of increased production cost, heavy lens size, and reduced imaging quality, and achieve the effects of low production cost, clear infrared imaging, and good imaging quality

Inactive Publication Date: 2020-04-21
广东省星聚宇光学股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In related technologies, in order to obtain better imaging quality, traditional lenses mounted on mobile phone cameras, TVs, and somatosensory game consoles mostly use multi-piece lens structures. Increased cost and reduced image quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Refer to the following Figure 1 to Figure 4 , to describe the infrared lens according to Embodiment 1 of the present invention. figure 1 A schematic structural diagram of an infrared lens according to Embodiment 1 of the present invention is shown.

[0075] Such as figure 1 As shown, the infrared lens includes four lenses L1-L4 in sequence from the object side to the image side along the optical axis. The first lens L1 has an object side S1 and an image side S2; the second lens L2 has an object side S3 and an image side S4; The third lens L3 has an object side S5 and an image side S6; the fourth lens L4 has an object side S7 and an image side S8. Optionally, the infrared lens may further include a filter L5 having an object side S9 and an image side S10, and the filter L5 may be a bandpass filter. In the infrared lens of this embodiment, an aperture STO may also be provided to adjust the amount of incoming light. The light from the object sequentially passes throug...

Embodiment 2

[0090] Refer to the following Figure 5 to Figure 8 , to describe the infrared lens according to Embodiment 2 of the present invention. Figure 5 A schematic structural diagram of an infrared lens according to Embodiment 2 of the present invention is shown.

[0091] Such as Figure 5 As shown, the infrared lens includes four lenses L1-L4 in sequence from the object side to the image side along the optical axis. The first lens L1 has an object side S1 and an image side S2; the second lens L2 has an object side S3 and an image side S4; The third lens L3 has an object side S5 and an image side S6; the fourth lens L4 has an object side S7 and an image side S8. Optionally, the infrared lens may further include a filter L5 having an object side S9 and an image side S10, and the filter L5 may be a bandpass filter. In the infrared lens of this embodiment, an aperture STO may also be provided to adjust the amount of incoming light. The light from the object sequentially passes thro...

Embodiment 3

[0107] Refer to the following Figure 9 to Figure 12 , describes the infrared lens according to Embodiment 3 of the present invention. Figure 9 A schematic structural diagram of an infrared lens according to Embodiment 3 of the present invention is shown.

[0108] Such as Figure 9 As shown, the infrared lens includes four lenses L1-L4 in sequence from the object side to the image side along the optical axis. The first lens L1 has an object side S1 and an image side S2; the second lens L2 has an object side S3 and an image side S4; The third lens L3 has an object side S5 and an image side S6; the fourth lens L4 has an object side S7 and an image side S8. Optionally, the infrared lens may further include a filter L5 having an object side S9 and an image side S10, and the filter L5 may be a bandpass filter. In the infrared lens of this embodiment, an aperture STO may also be provided to adjust the amount of incoming light. The light from the object sequentially passes throu...

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Abstract

The invention provides an infrared lens, which sequentially comprises a first lens, a second lens, a third lens and a fourth lens from an object side to an image side, wherein the object side surfaceof the first lens is a concave surface, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a convex surface; the curvature radius of the object side surface of the second lens is R21, the curvature radius of the object side surface of the third lens is R31, and the relational expression that 1<R21 / R31<5 is met; and in another specific embodiment, the air interval between the second lens and the third lens on the optical axis is AG23, the sum of the air intervals between all the lenses is [sigma]AG, and the relational expression that0.5<AG23 / [sigma]AG<0.65 is met. The beneficial effects of the invention are that the infrared lens achieves the infrared imaging and depth sensing under the condition that the structure is compact, and has the advantages of good imaging quality, low production cost and the like; and by using the lens made of a visible light filtering material, the lens can filter most visible light, so that infrared imaging is clearer and less interfered by the visible light.

Description

【Technical field】 [0001] The invention relates to the technical field of optical lenses, in particular to an infrared lens. 【Background technique】 [0002] In recent years, with the rise of smart phones, the demand for miniaturized photographic lenses has been increasing, and the photosensitive devices of general photographic lenses are nothing more than photocoupled devices (Charge Coupled Device, CCD) or complementary metal oxide semiconductor devices (Complementary Metal -OxideSemiconductor Sensor, CMOS Sensor), and due to the improvement of semiconductor manufacturing process technology, the pixel size of photosensitive devices has been reduced, and today's electronic products are developing with good functions and thin, light and small appearance. Therefore, it has good The miniaturized infrared lens with imaging quality has become the mainstream in the market. [0003] In related technologies, in order to obtain better imaging quality, traditional lenses mounted on mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/14G02B13/18
CPCG02B13/004G02B13/008G02B13/14G02B13/18
Inventor 王锋孙加安周明明马庆鸿万良伟
Owner 广东省星聚宇光学股份有限公司