Light source structure of tilting detector

Abstract

The utility model discloses a light source structure of a tilting detector, which can provide uniformly distributed dot matrix light sources and meet the requirements of experimental detection. The light source structure of the tilting detector comprises a laser diode, a pair of aspherical lenses, a fundamental frequency crystal, a frequency doubling crystal, a biconcave lens, a focusing lens, a grating plate, a circuit board and a PD sheet, wherein the laser diode, the aspherical lenses, the fundamental frequency crystal, the frequency doubling crystal, the biconcave lens and the grating plate are coaxially arranged; the positive electrode and the negative electrode of the laser diode are electrically connected with the circuit board, and the circuit board is provided with a key switch. The cambered surfaces of the aspherical lenses are oppositely arranged; and the PD sheet and the frequency doubling crystal are oppositely arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of optical instruments, in particular to a light source structure of a tilting detector. Background Art

[0002] When testing the warping of products, especially transparent and thin products, it is difficult to detect whether the product is warped using a general warping detector.

[0003] There is a detection method designed to illuminate the product with a dot matrix light source, and compare the dot matrix after reflection or refraction of the product with the dot matrix of the sample. If non-overlapping light spots are found, it means that there is a warping situation. However, there is currently no ready-made instrument that can provide a uniformly distributed dot matrix light source. Utility Model Content

[0004] The purpose of the utility model is to provide a light source structure of a tilting detector, which solves the problems existing in the prior art and can provide a uniformly distributed dot matrix light source to meet the needs of experimental detection.

[0005] In order to achieve the above purpose, the solution of the utility model is:

[0006] A light source structure of a lift detector includes a coaxially arranged laser diode, a pair of aspheric lenses, a fundamental frequency crystal, a frequency doubling crystal, a biconcave lens, a focusing lens and a grating plate, as well as a circuit board and a PD sheet; the positive and negative electrodes of the laser diode are electrically connected to the circuit board respectively, and the circuit board is provided with a key switch; the arc surfaces of the aspheric lenses are arranged facing each other; the PD sheet and the frequency doubling crystal are arranged opposite to each other.

[0007] The light source structure of the lift detector also includes a coaxially arranged first fixing seat, an adjustment bracket and a second fixing seat; the first end of the adjustment bracket is fixedly connected to the first fixing seat, and the second end thereof is threadedly connected to the second fixing seat; the laser diode and the aspheric lens are both installed in the first fixing seat; the base frequency crystal, the frequency doubling crystal, the biconcave lens and the PD sheet are all installed in the adjustment bracket; the focusing lens is installed in the second fixing seat.

[0008] Preferably, the first fixing seat is provided with a first lens seat for fixing the aspheric lens, a sleeve for fixing the laser diode, and a first fastening ring for axially limiting the first lens seat and the sleeve, and the first lens seat is coaxially arranged with the sleeve.

[0009] Preferably, the first fastening ring is threadedly connected to the inner wall of the first fixing seat.

[0010] Preferably, the adjustment bracket is provided with a crystal seat for fixing the fundamental frequency crystal, a fixing frame for fixing the frequency doubling crystal and the PD plate, and a second lens seat for fixing the biconcave lens, and the crystal seat, the fixing frame and the second lens seat are coaxially arranged.

[0011] Preferably, the first end of the second fixing seat is threadedly connected to the adjusting bracket, and the second end thereof is provided with a third lens seat for fixing the focusing lens and a second fastening ring for axially limiting the focusing lens.

[0012] The circuit board is provided with positive and negative wires for connecting to a power source.

[0013] After adopting the above technical solution, the utility model has the following technical effects:

[0014] Through the above scheme, the light emitted by the laser diode of the utility model can form a dot matrix light source after passing through the aspheric lens, fundamental frequency crystal, frequency doubling crystal, biconcave lens, focusing lens and grating plate in sequence, which can be applied to the product lift detection experiment to achieve the purpose of lift detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model;

[0016] Description of Figure Numbers:

[0017] 1-laser diode; 2-aspheric lens; 3-base frequency crystal; 4-frequency doubling crystal; 5-double concave lens; 6-focusing lens; 7-grating plate; 8-circuit board; 81-key switch; 82-positive and negative wires; 9-PD sheet; 10-first fixing seat; 20-adjusting bracket; 30-second fixing seat; 40-first lens seat; 50-sleeve; 60-first fastening ring; 70-crystal seat; 80-fixing frame; 90-second lens seat; 100-third lens seat; 200-second fastening ring. DETAILED DESCRIPTION

[0018] In order to further explain the technical solution of the present utility model, the present utility model is described in detail below through specific embodiments.

[0019] refer to Figure 1 As shown, the utility model discloses a light source structure of a warping detector, including a coaxially arranged laser diode (LD) 1, a pair of aspherical lenses 2, a fundamental frequency crystal 3, a frequency doubling crystal 4, a double concave lens 5, a focusing lens 6 and a grating plate 7, as well as a circuit board 8 and a PD sheet 9;

[0020] The positive and negative electrodes of the laser diode 1 are electrically connected to the circuit board 8 respectively, and the circuit board 8 is provided with a key switch 81;

[0021] The arc surfaces of the aspheric lens 2 are arranged facing each other;

[0022] The PD piece 9 is arranged opposite to the frequency doubling crystal 4 .

[0023] Through the above scheme, the light emitted by the laser diode 1 of the utility model can form a dot matrix light source after passing through the aspheric lens 2, the fundamental frequency crystal 3, the frequency doubling crystal 4, the biconcave lens 5, the focusing lens 6 and the grating plate 7 in sequence, which can be applied to the product lift detection experiment to achieve the purpose of lift detection; wherein,

[0024] Specific embodiments of the present utility model are shown below.

[0025] The utility model also includes a first fixed seat 10, an adjustment bracket 20 and a second fixed seat 30 which are coaxially arranged; the first end of the adjustment bracket 20 is fixedly connected to the first fixed seat 10, and the second end thereof is threadedly connected to the second fixed seat 30, so as to adjust the relative distance between the first fixed seat 10 and the second fixed seat 30; the laser diode 1 and the aspheric lens 2 are both installed in the first fixed seat 10; the base frequency crystal 3, the frequency doubling crystal 4, the biconcave lens 5 and the PD sheet 9 are all installed in the adjustment bracket 20; and the focusing lens 6 is installed in the second fixed seat 30.

[0026] In some embodiments of the utility model, the first fixed seat 10 is provided with a first lens seat 40 for fixing the aspheric lens 2, a sleeve 50 for fixing the laser diode 1, and a first fastening ring 60 for axially limiting the first lens seat 40 and the sleeve 50, so as to prevent the first lens seat 40 and the sleeve 50 from loosening from the first fixed seat 10, and the first lens seat 40 and the sleeve 50 are coaxially arranged.

[0027] Furthermore, the first fastening ring 60 is threadedly connected to the inner wall of the first fixing seat 10 to facilitate assembly and disassembly.

[0028] In some embodiments of the utility model, the above-mentioned adjustment bracket 20 is provided with a crystal seat 70 for fixing the fundamental frequency crystal 3, a fixing frame 80 for fixing the frequency doubling crystal 4 and the PD plate 9, and a second lens seat 90 for fixing the biconcave lens 5. The crystal seat 70, the fixing frame 80 and the second lens seat 90 are coaxially arranged.

[0029] In some embodiments of the present invention, the first end of the second fixing seat 30 is threadedly connected to the adjusting bracket 20, and the second end thereof is provided with a third lens seat 100 for fixing the focusing lens 6, and a second fastening ring 200 for axially limiting the focusing lens 6 to prevent the focusing lens 6 from loosening from the third lens seat 100.

[0030] The circuit board 8 is provided with positive and negative wires 82 for connecting to a power source.

[0031] The working principle of the utility model is:

[0032] (1) Laser diode 1 is used as a pump light source and is focused by aspheric lens 2;

[0033] (2) After being focused, it is incident on the fundamental frequency crystal 3 to generate fundamental frequency light;

[0034] (3) The fundamental frequency light is frequency-doubled by nonlinear effect after passing through the frequency-doubling crystal 4, the wavelength is halved, the frequency is doubled, and green light is generated;

[0035] (4) After frequency doubling, the green light spot (with a small divergence angle) is expanded and amplified by a biconcave lens 5, and then shaped into a parallel light beam by a focusing lens 6 and projected onto a grating plate 7 to obtain a multi-point light source, which is then irradiated onto the substance to be tested. In combination with other instruments / accessories required for the experiment, test data can be obtained.

[0036] The above embodiments and drawings do not limit the product form and style of the present utility model. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present utility model.

Claims

1. A light source structure of a tilting detector, characterized in that: It includes a coaxially arranged laser diode, a pair of aspherical lenses, a fundamental frequency crystal, a frequency doubling crystal, a double concave lens, a focusing lens and a grating plate, as well as a circuit board and a PD sheet; The positive and negative electrodes of the laser diode are electrically connected to the circuit board respectively, and the circuit board is provided with a key switch; The arc surfaces of the aspheric lenses are arranged facing each other; The PD sheet and the frequency doubling crystal are arranged opposite to each other.

2. The light source structure of the tilting detector according to claim 1, characterized in that: It also includes a coaxially arranged first fixing seat, an adjustment bracket and a second fixing seat; the first end of the adjustment bracket is fixedly connected to the first fixing seat, and the second end thereof is threadedly connected to the second fixing seat; the laser diode and the aspheric lens are both installed in the first fixing seat; the base frequency crystal, the frequency doubling crystal, the biconcave lens and the PD sheet are all installed in the adjustment bracket; the focusing lens is installed in the second fixing seat.

3. The light source structure of the tilting detector according to claim 2, characterized in that: The first fixing seat is provided with a first lens seat for fixing the aspheric lens, a sleeve for fixing the laser diode, and a first fastening ring for axially limiting the first lens seat and the sleeve. The first lens seat is coaxially arranged with the sleeve.

4. The light source structure of the tilting detector according to claim 3, characterized in that: The first fastening ring is threadedly connected to the inner wall of the first fixing seat.

5. The light source structure of the tilting detector according to claim 2, characterized in that: The adjustment bracket is provided with a crystal seat for fixing the fundamental frequency crystal, a fixing frame for fixing the frequency doubling crystal and the PD sheet, and a second lens seat for fixing the biconcave lens. The crystal seat, the fixing frame and the second lens seat are coaxially arranged.

6. The light source structure of the tilting detector according to claim 2, characterized in that: The first end of the second fixing seat is threadedly connected to the adjusting bracket, and the second end thereof is provided with a third lens seat for fixing the focusing lens and a second fastening ring for axially limiting the focusing lens.

7. The light source structure of the tilting detector according to claim 1, characterized in that: The circuit board is provided with positive and negative wires for connecting to a power source.

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