Prime lens and imaging equipment

A fixed-focus lens and imaging surface technology, applied in the field of imaging lenses, can solve problems such as it is difficult to meet the diversified use requirements of drones

Active Publication Date: 2021-05-18
合肥联创光学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, conventional optical lenses on the market are difficult to meet the diversified use needs of drones

Method used

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  • Prime lens and imaging equipment

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0077] see figure 1 , is a schematic diagram of the structure of the fixed-focus lens 100 provided in the first embodiment of the present invention. The fixed-focus lens 100 includes in sequence from the object side to the imaging surface along the optical axis: a first lens L1, a second lens L2, a third lens L3, The optical centers of the diaphragm ST, the fourth lens L4, the fifth lens L5, the sixth lens L6, the seventh lens L7, and the filter G1 are located on the same straight line.

[0078] The first lens L1 has negative refractive power, the object side S1 of the first lens is a convex surface, and the image side S2 of the first lens is a concave surface;

[0079] The second lens L2 has a negative refractive power, the object side S3 of the second lens is a convex surface, and the image side S4 of the second lens is a concave surface;

[0080] The third lens L3 has positive refractive power, the object side S5 of the third lens is convex at the near optical axis and has...

no. 2 example

[0096] see Figure 5 , is a schematic structural diagram of the fixed-focus lens 200 provided by the second embodiment. The fixed-focus lens 200 in this embodiment is roughly the same as the fixed-focus lens 100 in the first embodiment, the difference is that there are differences in the relevant parameters of each lens in the fixed-focus lens 200 in this embodiment, specifically the parameters of each lens The relevant parameters are shown in Table 3.

[0097] table 3

[0098]

[0099] Please refer to Table 4, which shows the relevant parameters of the aspheric surface of the fixed-focus lens 200 in this embodiment.

[0100] Table 4

[0101]

[0102] see Figure 6 , shows the field curvature diagram of the fixed-focus lens 200 provided by the second embodiment of the present invention. It can be seen from the figure that the field curvature in the meridian direction and the sagittal direction is controlled within ±0.05 mm, indicating that the fixed-focus lens 200 C...

no. 3 example

[0115] see Figure 9 , shows the imaging device 300 provided by the third embodiment of the present invention, and the imaging device 300 may include an imaging element 310 and the fixed-focus lens (for example, the fixed-focus lens 100 ) in any of the above-mentioned embodiments. The imaging element 310 may be a CMOS (Complementary Metal Oxide Semiconductor, Complementary Metal Oxide Semiconductor) image sensor, and may also be a CCD (Charge Coupled Device, Charge Coupled Device) image sensor.

[0116] The imaging device 300 may be a drone, an action camera, a security monitoring device, or any other electronic device equipped with the above-mentioned fixed-focus lens.

[0117] The imaging device 300 provided in the embodiment of the present application includes a fixed-focus lens 100. Since the fixed-focus lens 100 has the advantages of super wide angle, miniaturization, light weight, good thermal stability, and high pixels, the imaging device 300 with the fixed-focus lens 1...

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Abstract

The invention discloses a prime lens and imaging equipment, and the prime lens comprises a first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens and a seventh lens from an object side to an imaging surface along an optical axis; the first lens has negative focal power, the object side surface of the first lens is a convex surface, and the image side surface of the first lens is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface of the second lens is a concave surface; the third lens has positive focal power, the object side surface of the third lens near the optical axis is a convex surface and has an inflection point, and the image side surface of the third lens is a convex surface ; the fourth lens has positive focal power, the object side surface and the image side surface of the fourth lens are convex surfaces; the fifth lens has negative focal power, the object side surface of the fifth lens near the optical axis is a convex surface, and the image side surface of the fifth lens is a concave surface; the sixth lens has positive focal power, and the object side surface and the image side surface of the sixth lens are convex surfaces; and the seventh lens has negative focal power, the object side surface of the seventh lens is a convex surface near the optical axis, the image side surface of the seventh lens is a concave surface near the optical axis, and the object side surface and the image side surface of the seventh lens have inflection points. The prime lens has the advantages of ultra-large wide angle, miniaturization, good thermal stability and the like.

Description

technical field [0001] The invention relates to the technical field of imaging lenses, in particular to a fixed-focus lens and imaging equipment. Background technique [0002] With the development of mobile internet, coupled with the popularity of social networking, video, and live broadcast software, people are more and more fond of photography, and their pursuit of imaging effects is also more diversified, requiring not only high-definition image quality, but also a large field of view With the ability to capture large-scale images with strong visual impact, drones have won the favor of consumers for their unique high-altitude perspective and wide-format shooting images. At present, UAVs are developing rapidly, and correspondingly, the demand for their supporting optical lenses is also increasing. [0003] Since UAVs are often used in complex environments such as severe vibration, high pressure and extreme temperature, the performance requirements for the optical lens are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B13/06G02B13/18G02B1/00G02B1/04
CPCG02B1/00G02B1/041G02B13/0045G02B13/06G02B13/18
Inventor 高博李伟娜鲍海江高航曾吉勇
Owner 合肥联创光学有限公司
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