CN210513029U

CN210513029U - Penetrating laser thickness gauge

Info

Publication number: CN210513029U
Application number: CN201921340933.XU
Authority: CN
Inventors: 王和云
Original assignee: Binocus Technology Foshan Co ltd
Current assignee: Binocus Technology Foshan Co ltd
Priority date: 2019-08-16
Filing date: 2019-08-16
Publication date: 2020-05-12
Anticipated expiration: 2029-08-16

Abstract

The utility model relates to a penetrability laser thickness gauge, which comprises a workbench and a laser emitting device, wherein the laser emitting device is used for emitting laser; the workbench is used for placing a transparent piece to be tested, and a notch is formed in the workbench; the penetrating laser thickness gauge further comprises a CCD detection device, the laser emission device and the CCD detection device are respectively arranged on two sides of the notch, laser deviates from a normal line of the transparent piece to be detected, and the CCD detection device is used for detecting a pixel displacement value on a plane after the laser penetrates through the transparent piece to be detected. The utility model discloses a laser pierces through calibrator has high-efficient accurate advantage.

Description

Penetrating laser thickness gauge

Technical Field

The utility model relates to an optical measurement technical field, concretely relates to penetrability laser thickness gauge.

Background

At present, the thickness of transparent glass materials in mobile phones, watches and tablet computers is usually detected by manually adopting calipers or dial gauges, and then the precision is controlled. However, the measuring tool is mainly influenced by factors such as the using method, the force uniformity and the measuring position of the measuring tool, the data obtained by different people are often greatly different, so that a large error is caused, and meanwhile, the manual measurement consumes time and labor, the production efficiency is low and the production cost is high.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims at providing an accurate efficient penetrability laser thickness gauge.

In order to realize the purpose of the utility model, the utility model provides a penetrability laser thickness gauge, which comprises a workbench and a laser emitting device, wherein the laser emitting device is used for emitting laser; the workbench is used for placing a transparent piece to be tested, and a notch is formed in the workbench; the penetrating laser thickness gauge further comprises a CCD detection device, the laser emission device and the CCD detection device are respectively arranged on two sides of the notch, laser deviates from a normal line of the transparent piece to be detected, and the CCD detection device is used for detecting a pixel displacement value on a plane after the laser penetrates through the transparent piece to be detected.

The further technical scheme is that the workbench is horizontally arranged, the laser emitting device is arranged above the notch, and the CCD detecting device is arranged below the notch.

The further technical scheme is that the workbench further comprises a supporting piece arranged around the notch, and the transparent piece to be tested is placed on the supporting piece.

The further technical scheme is that the number of the supporting pieces is two, and the two supporting pieces are symmetrically arranged on two sides of the notch.

The further technical scheme is that the supporting piece comprises a bracket and a rolling shaft arranged on the bracket, the bracket is fixed on the workbench, and the transparent piece to be measured is placed on the rolling shaft.

The further technical scheme is that the penetrating laser thickness gauge further comprises a processing device, and the processing device calculates the thickness of the transparent piece to be measured according to the offset angle, the pixel displacement value on the plane and the refractive index of the transparent piece to be measured.

The further technical scheme is that the processing device calculates the thickness of the transparent piece to be measured through a triangular algorithm.

The further technical scheme is that the CCD detection device is fixed below the workbench through a support frame.

The further technical proposal is that the laser is a parallel laser beam; the laser emitting device comprises a light source, a first Fresnel lens and a second Fresnel lens, wherein the light source faces the first Fresnel lens and the second Fresnel lens, and the first Fresnel lens and the second Fresnel lens are coaxial. Diverging light beams emitted by the LED light source pass through the first Fresnel lens, and the first Fresnel lens homogenizes the diverging light beams to form uniform light beams; the dodging light beam passes through the second Fresnel lens, and the second Fresnel lens collimates the dodging light beam to form a collimated light beam parallel to the main optical axis of the second Fresnel lens.

The further technical scheme is that the thicknesses of the first Fresnel lens and the second Fresnel lens are both 3mm, the number of rings is 40, and the refractive indexes of the first Fresnel lens and the second Fresnel lens are both 1.4936 under the wavelength of 550 nm.

Compared with the prior art, the utility model discloses can gain following beneficial effect: the utility model discloses a laser pierces through thickness measuring method can more high-efficient, accurate, scientifically obtain the actual thickness value of transparent piece that awaits measuring. The laser enters the transparent piece to be measured from the air and the transparent piece to be measured from the air, so that medium changes occur twice, and the incidence angle is slightly changed. The utility model discloses a CCD detection device catches the skew angle of laser and at planar pixel displacement value, can calculate the thickness of transparent piece that awaits measuring through the triangle algorithm is reverse.

Drawings

Fig. 1 is a schematic diagram of a three-dimensional structure of an embodiment of the penetrating laser thickness gauge of the present invention.

Fig. 2 is a schematic structural diagram of a laser emitting device according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1, the penetrating laser thickness gauge of the present embodiment includes a table 10, a laser emitting device 20, and a CCD detecting device 30.

The table 10 is used for placing the transparent object to be tested 40. Specifically, in the present embodiment, the worktable 10 is horizontally disposed, the worktable 10 is provided with a notch 11 and two supporting members 12 disposed around the notch 11, and the two supporting members 12 are symmetrically disposed on two sides of the notch 11. The supporting member 12 includes a bracket 13 and a roller 14 disposed on the bracket 13, the bracket 13 is disposed at both ends of the roller 14, the bracket 13 is fixed on the worktable 11, and the transparent member to be measured 40 is placed on the roller 14. The supporting member 12 is used for supporting the transparent object to be measured 40, and the roller 14 is arranged to help prevent scratching the transparent object to be measured 40 when the transparent object to be measured 40 moves.

The laser emitting device 20 and the CCD detecting device 30 are respectively disposed at two sides of the notch 11, in this embodiment, the laser emitting device 20 is disposed above the notch 11, and the CCD detecting device 30 is disposed below the notch 11.

The laser emitting device 20 is configured to emit parallel laser beams, where the laser beams deviate from a normal of the transparent device under test 40, that is, the laser beams are not perpendicular to the transparent device under test 40, and the laser beams and the transparent device under test 40 form an incident angle greater than 0 ° and less than 90 °, so that the laser beams can be refracted at an interface of the transparent device under test 40. By adjusting the position and angle of the laser emitting device 20, the position and incident angle of the laser beam can be adjusted. In the present embodiment, as shown in fig. 2, the laser emitting device 20 includes a light source 21, a first fresnel lens 22, and a second fresnel lens 23, the light source 21 faces the first fresnel lens 22 and the second fresnel lens 23, and the light source 21 emits divergent light. The first Fresnel lens 22 and the second Fresnel lens 23 are coaxial, the thicknesses of the first Fresnel lens 22 and the second Fresnel lens 23 are both 3mm, the number of rings is 40, the refractive indexes of the Fresnel lens 22 and the second Fresnel lens 23 are both 1.4936 under the wavelength of 550nm, the materials of the Fresnel lens are both PMMA, and the working distance of the laser emitting device 20 is 40mm to 160 mm. The first fresnel lens 22 plays a role in light uniformizing, and the second fresnel lens 23 plays a role in collimation, so that a parallel light path is obtained. In other embodiments of the present invention, the laser emitting device 20 may be an existing laser emitter capable of emitting parallel laser beams.

The CCD detection device 30 is fixed below the worktable 10 by a support bracket 31, the CCD is a charge coupled device, and the CCD detection device 30 is used for detecting the offset angle and the pixel displacement value on the plane after the laser passes through the transparent object to be measured 40. The CCD detection device 30 transmits the offset angle and the pixel displacement value on the plane to the processing device, and the processing device calculates the thickness of the transparent object to be measured 40 in reverse by a trigonometric algorithm according to the offset angle, the pixel displacement value on the plane and the refractive index of the transparent object to be measured 40. The trigonometric algorithm calculates the thickness from the displacement value and the offset angle by means of a trigonometric function.

It is from top to bottom visible, the utility model discloses a penetrability laser thickness meter is applicable to the transparent glass material that transparent piece such as in cell-phone, watch and the panel computer that awaits measuring, is particularly useful for slice or platelike transparent material. The utility model discloses a laser pierces through calibrator has high-efficient accurate advantage.

Finally, it should be emphasized that the above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A penetrability laser thickness gauge comprises a workbench and a laser emitting device, wherein the laser emitting device is used for emitting laser; the method is characterized in that:

the workbench is used for placing a transparent piece to be tested, and a notch is formed in the workbench; penetrating laser thickness gauge still includes CCD detection device, laser emission device with CCD detection device sets up respectively the both sides of breach, laser skew the transparent normal line that awaits measuring, CCD detection device is used for detecting laser passes pixel displacement value on the plane behind the transparent piece that awaits measuring.

2. A penetrating laser thickness gauge according to claim 1, wherein:

the workbench is horizontally arranged, the laser emitting device is arranged above the notch, and the CCD detecting device is arranged below the notch.

3. A penetrating laser thickness gauge according to claim 1, wherein:

the workbench further comprises a supporting piece arranged around the notch, and the transparent piece to be tested is placed on the supporting piece.

4. A penetrating laser thickness gauge according to claim 3, wherein:

the number of the supporting pieces is two, and the two supporting pieces are symmetrically arranged on two sides of the notch.

5. A penetrating laser thickness gauge according to claim 4, wherein:

the supporting piece comprises a bracket and a rolling shaft arranged on the bracket, the bracket is fixed on the workbench, and the transparent piece to be tested is placed on the rolling shaft.

6. A penetrating laser thickness gauge according to any one of claims 1 to 5, wherein:

CCD monitoring devices still is used for detecting the skew angle of laser, penetrability laser thickness meter still includes processing apparatus, processing apparatus basis the skew angle pixel displacement value on the plane and the transparent refracting index of awaiting measuring the piece calculates the transparent thickness of awaiting measuring the piece.

7. A penetrating laser thickness gauge according to claim 6, wherein:

and the processing device calculates the thickness of the transparent piece to be detected through a triangular algorithm.

8. A penetrating laser thickness gauge according to any one of claims 1 to 5, wherein:

the CCD detection device is fixed below the workbench through a support frame.

9. A penetrating laser thickness gauge according to any one of claims 1 to 5, wherein:

the laser is a parallel laser beam; the laser emitting device comprises a light source, a first Fresnel lens and a second Fresnel lens, wherein the light source faces the first Fresnel lens and the second Fresnel lens, and the first Fresnel lens and the second Fresnel lens are coaxial;

a divergent light beam emitted by the light source passes through the first Fresnel lens, and the first Fresnel lens homogenizes the divergent light beam to form a uniform light beam; the dodging light beam passes through the second Fresnel lens, and the second Fresnel lens collimates the dodging light beam to form a collimated light beam parallel to a main optical axis of the second Fresnel lens.

10. A penetrating laser thickness gauge according to claim 9, wherein:

the thickness of the first Fresnel lens and the thickness of the second Fresnel lens are both 3mm, the number of rings is 40, and the refractive index of the first Fresnel lens and the refractive index of the second Fresnel lens are both 1.4936 at the wavelength of 550 nm.