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Common-optical-path double-waveband optical system, imaging device and optical lens

An optical system and dual-band technology, applied in the field of optics, can solve problems such as high manufacturing costs and expensive materials, and achieve the effect of improving comparability

Active Publication Date: 2019-05-10
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this system can only be used in the visible and mid-infrared bands, and the mid-infrared wavelength range is 3.0um to 5.0um, and the materials used in the system are expensive and the manufacturing cost is high

Method used

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  • Common-optical-path double-waveband optical system, imaging device and optical lens
  • Common-optical-path double-waveband optical system, imaging device and optical lens
  • Common-optical-path double-waveband optical system, imaging device and optical lens

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] see figure 1, a common optical path dual-band optical system, including: a third lens group C, a fourth lens group D, a first lens group A and a dichroic prism B arranged in sequence from the object side to the image side, and the first lens group A The light exit surface is connected to the object side optical path of the dichroic prism B; the third lens group C is connected to the light path of the light exit surface of the dichroic prism B. The fourth lens group D is connected to the optical path of the light-reflecting surface of the dichroic prism B.

[0056] Dichroic prism B includes a first isosceles right-angle prism sheet and a second isosceles right-angle prism sheet, the hypotenuses of the first isosceles right-angle prism sheet and the second isosceles right-angle prism sheet are connected, and a spectroscopic film is coated on the hypotenuse , the spectroscopic film transmits visible light and reflects near-infrared light. thereby

[0057] The first lens...

Embodiment 2

[0080] The difference from Embodiment 1 is that the meniscus negative lens A1 satisfies

[0081] A1 R1 =44·3

[0082] A1 R1 -A1 R2 =24·5

[0083] Biconcave negative lens A2 satisfies

[0084] n A2 *f A2 |=66.3

[0085] Biconvex positive lens A4 satisfies

[0086] f A4 =25.3

[0087] Meniscus negative lens A6 satisfies

[0088] |f A6 |=17.6

[0089] V A6 =23.8

[0090] The lens parameters of Example 2 are shown in Table 2.

[0091] Table 2

[0092]

[0093] The technology obtained in embodiment 2 meets with that in embodiment 1 Figure 2-5 The results were similar. Depend on Figure 2-5 It can be seen that the optical system provided by the present application is small in size, simple in structure, and low in cost, which can realize simultaneous imaging of the same target, and the imaging result can separate imaging of visible light optical information and near-infrared optical information, thereby improving the performance of the same target in different ...

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Abstract

The invention discloses a common-optical-path double-waveband optical system, an imaging device and an optical lens. The system comprises a first lens group, a beam splitting prism, a third lens groupand a fourth lens group; the first lens group and the beam splitting prism are sequentially arranged from the object side to the image side; the third lens group is connected with the visible light exiting surface optical path of the beam splitting prism; and the fourth lens group is connected with the near-infrared light reflection exiting surface optical path of the beam splitting prism. By means of the common-optical-path double-waveband optical system, a target can be respectively imaged at the same time under visible light and near-infrared spectral waveband; and influence of light difference on the imaging result comparability can be effectively reduced.

Description

technical field [0001] The application relates to a common optical path dual-band optical system, an imaging device, and an optical lens, belonging to the field of optics. Background technique [0002] Visible light is the part of the electromagnetic spectrum that can be perceived by the human eye, with a wavelength range of 0.38 to 0.76 microns. Near-infrared light refers to electromagnetic waves with a wavelength range of 0.75 to 3 microns. The light in this band cannot be perceived by the human eye. Many substances show unique characteristics in this band. Using this feature, the light in this band can be used for medical imaging and identification etc. Under the visible light and infrared bands, the object imaging mechanism is different, and the target characteristic information reflected by the two is also different. [0003] Visible light images are rich in scene details, but are susceptible to interference from weather and the external environment. After using CCD / C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/10
Inventor 古克义张新彬陈怀熹李广伟冯新凯梁万国黄玉宝
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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