Reflection transmittance measuring instrument

Abstract

This invention discloses a reflective transmittance measuring instrument, relating to the technical field of transmittance meters. It includes a main unit and a reflector. A display screen is located at the front end of the main unit. The main unit contains a measuring device and a circuit module. A light source emitting probe is located at one end of the measuring device, and a convex lens is located at the other end. A light-transmitting aperture is provided on the main unit, with the convex lens positioned at the aperture. A semi-reflective lens is provided on the measuring device, located between the light source emitting probe and the convex lens. A sensor receiving probe is also provided on the measuring device. Compared to existing technologies, the advantages of this invention are: the light source emitting probe and the sensor receiving probe are located on the same side of the object being measured, eliminating the need for alignment along the same axis, thus simplifying its use.

Description

Technical Field

[0001] The invention relates to the technical field of light transmittance meters, and in particular to a reflective light transmittance measuring instrument. Background Art

[0002] Light will be lost when passing through the sample, that is, the transmitted light flux through the sample is always less than the incident light flux irradiating the sample. The ratio of the two, expressed as a percentage, is defined as transmittance internationally. The transmittance meter is an instrument used to detect the transmittance of an object. The transmittance meter can be used in: automobile manufacturing and testing, glass products, on-site measurement of the aerospace industry, transmittance measurement of glasses, sunglasses, sunscreen protective films, transmittance measurement of plastic products, transmittance measurement of transparent or translucent materials, etc.

[0003] At present, the existing transmittance meters on the market have a light source emitting probe on one side and a sensor receiving probe on the other side, and adopt a through-beam measurement. During measurement, the two sides are required to be on the same axis, otherwise data deviation is likely to occur, which is inconvenient to use. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present invention provides a reflective transmittance measuring instrument, in which the light source transmitting probe and the sensor receiving probe are located on the same side of the object to be measured, and there is no need to align the same axis, which is easy to use.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a reflective transmittance measuring instrument, comprising a main unit and a reflector, a display screen is arranged at the front end of the main unit, a measuring device and a circuit module are arranged inside the main unit, a light source emitting probe is arranged at one end of the measuring device, and a convex lens is arranged at the other end, a light transmission hole is arranged on the main unit, and the convex lens is located at the position of the light transmission hole, a half-reflective half-mirror is arranged on the measuring device, and the half-reflective half-mirror is located between the light source emitting probe and the convex lens, and a sensor receiving probe is arranged on the measuring device.

[0006] The measuring device is arranged obliquely with respect to the host.

[0007] The sensor receiving probe is a silicon photocell.

[0008] The normal of the sensor receiving probe is perpendicular to the normal of the light source emitting probe, and the angle between the half-reflecting half-mirror and the light source emitting probe and the angle between the half-reflecting half-mirror and the normal of the sensor receiving probe are both 45°.

[0009] The mainframe and the reflective plate are provided with magnets that attract each other on the opposite side.

[0010] The reflector is a white reflector, and the back side of the reflector is black.

[0011] Also included is a rechargeable battery for powering the light source transmitting probe.

[0012] The host is provided with a charging socket, and the charging socket is electrically connected to the rechargeable battery.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The measuring device of the present invention is located inside the main unit, the light source transmitting probe and the sensor receiving probe are located on the same side of the object to be measured, and a reflector is used on the other side. It is sufficient for all the emitted light to hit the reflector, and there is no need to align the same axis, which is flexible and convenient to use.

[0015] 2. The measuring device is tilted to the host computer so that the sensor receiving probe avoids the interference of the mirror reflected light on the board to be measured, leaving only the reverse reflected light, so that the light source and the sensor can be on the same side, avoiding the situation that the light source and the sensor of the original transmittance meter are not coaxial when measuring on both sides.

[0016] 3. The main unit and the reflector are provided with magnets that attract each other on the opposite side, so that the main unit and the reflector can be attracted together when in use, and the required measuring plate can be fixed, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a schematic diagram of the host structure of the present invention;

[0018] Attached Figure 2 It is a schematic diagram of the structure of the stepped cross-sectional view of the present invention.

[0019] The numbers shown in the accompanying drawings are: 1. host; 2. reflector; 3. display screen; 4. measuring device; 5. light source emitting probe; 6. convex lens; 7. light transmission hole; 8. semi-reflective and semi-mirror lens; 9. sensor receiving probe; 10. charging socket; 11. switch. DETAILED DESCRIPTION

[0020] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0021] A reflective transmittance measuring instrument comprises a mainframe 1 and a reflector 2. A display screen 3 is arranged at the front end of the mainframe 1, and the display screen is used to display the measurement result. A measuring device 4 and a circuit module are arranged inside the mainframe 1. The circuit module is a prior art, which is the same as the circuit module of the existing transmittance measuring instrument, and comprises a light signal attenuation amplification circuit and a transmittance calculation circuit. A light source transmitting probe 5 is arranged at one end of the measuring device 4, and the light source transmitting probe is an LED light-emitting device. A convex lens 6 is arranged at the other end. A light transmission hole 7 is arranged on the mainframe 1, and the convex lens 6 is located at the position of the light transmission hole 7. A half-reflecting half-mirror 8 is arranged on the measuring device 4, and the half-reflecting half-mirror 8 is located between the light source transmitting probe 5 and the convex lens 6. A sensor receiving probe 9 is arranged on the measuring device 4. The measuring device 4 comprises a body, a cavity is arranged inside the body, the light source transmitting probe is located at one end of the body, and an end cap is detachably arranged at the other end of the body. The convex lens is fixed to the body through the end cap, the half-reflecting half-mirror is fixed inside the body cavity through a card slot, and the sensor receiving probe is fixed inside the body cavity. In the device, the light source transmitting probe and the sensor receiving probe are located on the same side, which avoids the situation that the light source transmitting probe and the sensor receiving probe of the original transmittance meter are distributed on both sides and are not coaxial during measurement, and is easy to use.

[0022] The working principle of this device is: during measurement, the host and the reflector are connected, and the light emitted by the light source transmitting probe is all reflected on the sensor receiving probe. The light intensity at this time is taken as 100% transmittance. The board to be tested is placed between the host and the reflector, and the light source transmitting probe emits light. The light passes through the semi-reflective and semi-mirror lens and the convex lens and shines on the board to be tested. Then the light passes through the reflector, the convex lens, and the semi-reflective and semi-mirror lens and shines on the sensor receiving probe. The sensor receiving probe transmits the signal to the circuit module, and the circuit module calculates the transmittance value after processing by the transmittance calculation circuit, and then displays it on the display screen.

[0023] As an optimization, the measuring device 4 is tilted relative to the host 1 to avoid mirror reflection light when the light emitted by the light source emitting probe hits the surface of the board to be tested, leaving only reverse reflection light, thereby avoiding mirror reflection light interfering with the sensor receiving probe measurement data.

[0024] Among them, the sensor receiving probe can be a light sensor. In this embodiment, the sensor receiving probe 9 is a silicon photocell. The silicon photocell directly converts light energy into electrical energy, and the photocurrent of the silicon photocell is proportional to the light intensity. The light intensity can be obtained through the photocurrent, which is easy to use.

[0025] Furthermore, the normal of the sensor receiving probe 9 is perpendicular to the normal of the light source emitting probe 5, and the angle between the half-reflecting half-mirror 8 and the normal of the light source emitting probe 5 and the angle between the half-reflecting half-mirror 8 and the normal of the sensor receiving probe 9 are both 45°, so that all the reflected light can be irradiated onto the sensor receiving probe, thereby improving the accuracy of the device.

[0026] As an optimization, mutually attracting magnets are arranged on opposite sides of the host 1 and the reflector 2, so as to facilitate the host and the reflector to be attracted together when in use, and to fix the required measuring plate, which is convenient for use.

[0027] As an optimization, the reflector 2 is a white reflector, and the back of the reflector 2 is black, so that the light irradiated on the reflector is reflected to the sensor receiving probe in the opposite direction of the incident direction, thereby improving the accuracy of the measurement.

[0028] The device also includes a rechargeable battery for powering the light source emitting probe 5. A charging socket 10 is provided on the host 1, and the charging socket 10 is electrically connected to the rechargeable battery. The rechargeable battery is used to power the device, which is not controlled by a power cord and is more convenient to use, as well as a switch 11 for controlling the power supply of the device.

Claims

1. A reflective light transmittance measuring instrument, characterized in that: The invention comprises a host (1) and a reflector (2), wherein a display screen (3) is arranged at the front end of the host (1), a measuring device (4) and a circuit module are arranged inside the host (1), a light source emitting probe (5) is arranged at one end of the measuring device (4), and a convex lens (6) is arranged at the other end, a light transmission hole (7) is arranged on the host (1), and the convex lens (6) is located at the position of the light transmission hole (7), a semi-reflective semi-mirror (8) is arranged on the measuring device (4), and the semi-reflective semi-mirror (8) is located between the light source emitting probe (5) and the convex lens (6), and a sensor receiving probe (9) is arranged on the measuring device (4); The measuring device (4) is arranged at an angle to the host (1), so that the sensor receiving probe avoids the interference of the mirror reflected light on the board to be measured, leaving only the reverse reflected light.

2. A reflective light transmittance measuring instrument according to claim 1, characterized in that: The sensor receiving probe (9) is a silicon photocell.

3. A reflective light transmittance measuring instrument according to any one of claims 1 to 2, characterized in that: The normal of the sensor receiving probe (9) is perpendicular to the normal of the light source emitting probe (5), and the angle between the half-reflecting half-mirror (8) and the light source emitting probe (5) and the angle between the half-reflecting half-mirror (8) and the normal of the sensor receiving probe (9) are both 45°.

4. A reflective light transmittance measuring instrument according to claim 1, characterized in that: Mutually attracting magnets are arranged on opposite sides of the main unit (1) and the reflective plate (2).

5. The reflective light transmittance measuring instrument according to claim 1, characterized in that: The reflector (2) is a white reflector (2), and the back side of the reflector (2) is black.

6. A reflective light transmittance measuring instrument according to claim 1, characterized in that: It also includes a rechargeable battery for supplying power to the light source emitting probe (5).

7. A reflective light transmittance measuring instrument according to claim 1, characterized in that: The host (1) is provided with a charging socket (10), and the charging socket (10) is electrically connected to a rechargeable battery.

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