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An incident optical system for a near-infrared spectrum sensing node and its working method

A near-infrared spectrum and sensing node technology, applied in the field of incident optical systems, to achieve the effects of easy installation integration, easy installation, and low price

Active Publication Date: 2018-08-28
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no spectral sensing node incident optical system with beam shaping and energy focusing has not been reported

Method used

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  • An incident optical system for a near-infrared spectrum sensing node and its working method
  • An incident optical system for a near-infrared spectrum sensing node and its working method
  • An incident optical system for a near-infrared spectrum sensing node and its working method

Examples

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Effect test

Embodiment 1

[0031] An incident optical system for a near-infrared spectrum sensing node, including a near-infrared light source, a plano-convex lens 1 arranged in sequence along the propagation direction of incident light, a positive cylindrical mirror 2 and a photosensitive element 3, and the incident light passes through the planar The convex side and the plane side of the convex lens 1 , the incident light passes through the convex cylinder side and the plane side of the positive cylindrical mirror 2 in sequence, and the near-infrared light finally enters the photosensitive element 3 .

[0032] The near-infrared light source is reflected light after sunlight irradiates the object to be detected, specifically near-infrared light with a wavelength range of 1350nm to 1550nm.

Embodiment 2

[0034] A kind of incident optical system for near-infrared spectrum perception node as described in embodiment 1, its difference is that, the curvature radius of the convex side of described plano-convex lens 1 is 52.51mm; The convex column of described positive cylindrical mirror 2 The radius of curvature on the surface side is 51.85 mm.

[0035] The plano-convex lens 1 has a focal length of 101.6 mm, a central thickness of 4 mm, and a clear aperture of 25.4 mm.

[0036] The positive cylindrical mirror 2 has a focal length of 100 mm, a central thickness of 3.16 mm, and a clear aperture of 25 mm.

[0037] The center-to-center distance between the plano-convex lens 1 and the positive cylindrical mirror 2 is 5.58 mm, and the total distance from the apex of the convex side of the plano-convex lens 1 to the photosensitive element 3 is 53.76 mm.

Embodiment 3

[0039] An incident optical system for a near-infrared spectrum sensing node as described in Example 2, the difference is that the plano-convex lens 1 and the positive cylindrical mirror 2 are both made of H-K9L crown glass. The focal length tolerance of the plano-convex lens 1 is ±1%, the size tolerance is 0.0-0.1mm, and the center thickness tolerance is ±0.1mm; the focal length tolerance of the positive cylindrical mirror 2 is ±2%, the size tolerance is 0.0-0.1mm, and the center thickness tolerance is ±2%. ±0.1mm.

[0040] Both sides of the plano-convex lens 1 and the positive cylindrical mirror 2 are coated with an anti-reflection film in the wavelength range of 1050nm to 1620nm, and the transmittance of the single-layer anti-reflection film is greater than 99.5%.

[0041] The photosensitive element 3 is a 256-element linear InGaAs detector with a 64-channel linear gradient filter, and its photosensitive surface 4 is a rectangle with a size of 12.8mm×0.5mm.

[0042]In combi...

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Abstract

An incident optical system used for a near infrared spectrum perception node comprises a near infrared light source, a plano-convex lens, a positive cylindrical mirror and a photosensitive component, wherein the plano-convex lens, the positive cylindrical mirror and the photosensitive component are successively arranged along an incident light propagation direction. Incident light successively passes through a convex surface side and a plane side of the plano-convex lens. The incident light successively passes through a convex cylindrical surface side and a plane side of the positive cylindrical mirror. Near infrared light finally enters into the photosensitive component. Optical beam shaping and energy gathering are performed on the near infrared light with a wave band of 1350nm to 1550nm. The system adopts the two lenses so as to shape a circular light beam at a pupil entrance into a linear light beam which is consistent with a size of a line array detector photosurface. Light energy losses are reduced, overall cost and a size of the system are decreased.

Description

technical field [0001] The invention relates to an incident optical system for a near-infrared spectrum sensing node and a working method thereof, belonging to the technical field of optical systems. technical background [0002] Traditional near-infrared spectrometers are usually only used for spectrum detection of samples to be analyzed in the laboratory. There is no detection distance. Observation, but its data acquisition cost is high, the data is not fine enough, and there is no indoor perception ability. Based on the miniature near-infrared spectrometer, a passive light source near-infrared spectral sensing node was developed for the first time, which is used to build a new type of spectral sensing Internet of Things, which can realize real-time dynamic sensing of material components in a local area. The spectrum sensing node intends to use sunlight as the light source to detect the diffuse reflectance spectrum of ground objects or other objects to be measured at a lo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G02B1/00G02B3/00G02B3/06
CPCG02B1/00G02B3/00G02B3/06G02B27/0911G02B27/0966
Inventor 王丽丽庄新港
Owner SHANDONG UNIV
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