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Four-piece infrared single wavelength lens system

a single wavelength, infrared technology, applied in the field of lenses, can solve the problems of poor material transparency, inability to meet the 3d game, inability to focus accurately, and change the focal length of the lens group, and achieve the effects of wide field of view, short length, and high resolution

Active Publication Date: 2017-08-17
NEWMAX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is about a new type of infrared lens system that can capture a wide field of view with high resolution, using a shorter length and less distortion.

Problems solved by technology

Nos. 098100552, 098125378 and U.S. Pat. Nos. 8,031,413, 8,369,031, however, at present, the game machine is based on a more three-dimensional, real and immediate 3D game, the current or the applicant's previous lens groups are all 2D plane games, which cannot meet the 3D game focusing on the deep induction efficacy.
Special infrared receiving and induction lens groups for game machines are made of plastic for the pursuit of low cost, however, poor material transparency is one of the key factors that affect the depth detection accuracy of the game machine, and plastic lenses are easy to overheat or too cold in ambient temperature, so that the focal length of the lens group will be changed and cannot focus accurately.
Therefore, the current infrared receiving and induction lens groups cannot meet the 3D game depth precise induction requirement.

Method used

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  • Four-piece infrared single wavelength lens system
  • Four-piece infrared single wavelength lens system
  • Four-piece infrared single wavelength lens system

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0043]The equation for the aspheric surface profiles of the respective lens elements of the first embodiment is expressed as follows:

[0044]wherein:

z=ch21+[1-(k+1)c2h2]0.5+Ah4+Bh6+Ch8+Dh10+Eh12+Gh14+…z

[0045]represents the value of a reference position with respect to a vertex of the surface of a lens and a position with a height h along the optical axis 190;

[0046]c represents a paraxial curvature equal to 1 / R (R: a paraxial radius of curvature);

[0047]h represents a vertical distance from the point on the curve of the aspheric surface to the optical axis 190;

[0048]k represents the conic constant;

[0049]A, B, C, D, E, G, . . . : represent the high-order aspheric coefficients.

[0050]In the first embodiment of the present four-piece infrared single wavelength lens system, a focal length of the four-piece infrared single wavelength lens system is f, a f-number of the four-piece infrared single wavelength lens system is Fno, the four-piece infrared single wavelength lens system has a maximum...

second embodiment

[0072]The detailed optical data of the second embodiment is shown in table 3, and the aspheric surface data is shown in table 4.

TABLE 3Embodiment 2f(focal length) = 1.24 mm, Fno = 1.4, FOV = 60 deg.surfaceCurvature RadiusThicknessMaterialIndexAbbe #Focal length0objectinfinity400.0001infinity0.4002Lens 1−2.076(ASP)0.270plastic1.53556.000603.5383−2.155(ASP)0.1644stopinfinity−0.0435Lens 22.343(ASP)0.525plastic1.53556.0001.5756−1.187(ASP)0.2787Lens 3−0.438(ASP)0.339plastic1.63623.9706.1768−0.509(ASP)0.0329Lens 40.765(ASP)0.279plastic1.63623.9708.599100.770(ASP)0.54011IR-filterinfinity0.300glass1.51064.167—12infinity0.04513Image planeinfinity0.000

TABLE 4Aspheric Coefficientssurface  2356K:−1.9344E+01−4.1274E+01 1.9796E+01−1.3866E+00 A: 0.0000E+000.0000E+000.0000E+000.0000E+00B: 6.3906E−011.7297E+001.0624E+001.0126E−01C:−6.4418E−01−4.1896E+00 −6.3821E+00 −2.5618E+00 D:−3.3596E−011.8910E+011.9827E+019.5996E+00E: 1.0656E+00−6.8506E+01 −1.0523E+02 −1.2610E+00 F:−1.0869E+009.7292E+014.6618E+0...

third embodiment

[0081]The detailed optical data of the third embodiment is shown in table 5, and the aspheric surface data is shown in table 6.

TABLE 5Embodiment 3f(focal length) = 1.137 mm, Fno = 1.6, FOV = 65 deg.surfaceCurvature RadiusThicknessMaterialIndexAbbe #Focal length0objectinfinity600.0001infinity0.4002Lens 1−0.761(ASP)0.311plastic1.53556.000−17.2693−0.947(ASP)0.3084stopinfinity−0.0135Lens 22.438(ASP)0.488plastic1.53556.0001.6476−1.255(ASP)0.2867Lens 3−0.467(ASP)0.267plastic1.63623.970139.1148−0.565(ASP)0.0309Lens 40.610(ASP)0.296plastic1.53556.0003.759100.734(ASP)0.56911IR-filterinfinity0.300glass1.51064.167—12infinity0.04513Image planeinfinity0.000

TABLE 6Aspheric Coefficientssurface  2356K:−4.2894E+00 −8.3994E+00 1.9519E+01−2.6858E−01 A:0.0000E+000.0000E+000.0000E+000.0000E+00B:4.5540E−016.3321E−014.0053E−01−2.2477E−01 C:−2.4186E−01 8.0617E−01−6.2522E+00 −4.0891E−01 D:1.0748E+00−3.0908E+00 4.6866E+01−9.4895E+00 E:−4.5161E+00 2.1199E+01−3.1816E+02 6.7333E+01F:6.9923E+00−8.1978E+01 1.0791...

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Abstract

A four-piece infrared single wavelength lens system includes, in order from the object side to the image side: a first lens element with a refractive power, a stop, a second lens element with a positive refractive power, a third lens element with a positive refractive power, and a fourth lens element with a positive refractive power. The focal length of the first lens element is f1, the focal length of the second lens element and the third lens element combined is f23, and they satisfy the relation: −210<f1 / f23<365. When the above relation is satisfied, a wide field of view can be obtained and the resolution can be improved evidently.

Description

BACKGROUND OF THE INVENTION[0001]Field of the Invention[0002]The present invention relates to a lens system, and more particularly to a miniaturized four-piece infrared single wavelength lens system applicable to electronic products.[0003]Description of the Prior Art[0004]Nowadays digital imaging technology is constantly innovating and changing, in particular, digital carriers, such as, digital camera and mobile phone and so on, have become smaller in size, so CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) sensor is also required to be more compact. In addition to be used in the field of photography, in recent years, infrared focusing lens has also be used in infrared receiving and sensing field of the game machine, and in order to make the scope of game machine induction user more broader, wide-angle lens group has become the mainstream for receiving infrared wavelength at present.[0005]The applicant has also put forward a number of lens groups relate...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): G02B13/00G02B27/00G02B9/34
CPCG02B13/008G02B27/0025G02B13/004G02B9/34
Inventor TSAI, FEI-HSINLEE, CHUN-SHENG
Owner NEWMAX TECH