CN212340438U

CN212340438U - Double-light-path light-splitting color photometer

Info

Publication number: CN212340438U
Application number: CN202021211767.6U
Authority: CN
Inventors: 袁琨; 贡双虎; 王坚
Original assignee: China Jiliang University
Current assignee: China Jiliang University
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-01-12
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a dual-optical-path light splitting color photometer, including the integrating sphere, with the light source that the light aperture cooperation of integrating sphere set up to and the sensor that sets up with the measurement mouth of integrating sphere, the cooperation of gauge hole, gauge hole and sensor between the cooperation be provided with second shutter, half anti-translucent device and lens, the reflection light of measurement mouth department gets into the sensor through the transmission of half anti-translucent device, the integrating sphere on the light aperture of seting up and half anti-translucent device between the cooperation be provided with leaded light device and first shutter, the reflection light of integrating sphere internal surface gets into the sensor through the reflection of half anti-translucent device.

Description

Double-light-path light-splitting color photometer

Technical Field

The utility model belongs to the technical field of the optical chromatic aberration measurement technique and specifically relates to a two light path beam split colorimeter has been related to.

Background

A spectrocolorimeter is a detecting instrument that calculates color values by performing spectral analysis on reflected light from the surface of an object. The measurement principle is that light that the light source sent carries out the back of constantly diffuse reflection in the integrating sphere, shine measured object surface from measuring aperture department, the reverberation on object surface has carried the colour information on object surface and has gone into spectral sensor behind optical devices such as lens, spectral sensor carries out the beam split processing with the light signal of gathering, the light intensity signal of converting into different spectra, photosensitive device through spectral sensor converts the signal of telecommunication into, the signal of telecommunication passes through integrated circuit and converts into digital signal, the computer is through the calculation to digital signal, calculate digital signal as the colour value.

The two most critical performance indexes of the spectrocolorimeter are measurement repeatability and indicating value errors. The measurement repeatability indicates that the maximum change of the measurement result is obtained by measuring the spectrophotometer for multiple times under the condition that the surface of the measured object does not change. Among the factors influencing the measurement repeatability, the intensity change of the light source is the most critical factor, and in the process of multiple measurements, the intensity of the light source can generate certain energy fluctuation, and the energy fluctuation can directly influence the stability of the measurement result.

The existing spectrocolorimeter usually adopts a double-optical-path design to eliminate the influence of the fluctuation of a light source on measurement. The method comprises the steps of independently setting a light path to collect the intensity of a light source, collecting a light signal emitted by the light source by adopting an optical fiber, transmitting the light signal to a first spectrum sensor, collecting the intensity of the first light signal by the first spectrum sensor, enabling the light signal reflected by the surface of a measured object to enter a second spectrum sensor, collecting the intensity of the second light signal by the second spectrum sensor, and calculating the intensities of the two light signals to obtain a final sampling signal. In this case, two spectrum sensors are required to detect the signal intensities of the object to be measured and the light source, respectively, and the cost is high.

Disclosure of Invention

For solving the not enough of prior art, realize reduce cost's purpose, the utility model discloses a following technical scheme:

the utility model provides a dual-optical-path beam split colorimeter, includes the integrating sphere, the light source that sets up with the light-passing hole cooperation of integrating sphere to and the sensor that sets up with the measurement mouth of integrating sphere, the cooperation of detection hole, detection hole and sensor between the cooperation be provided with second shutter, semi-reflection and semi-transmission device and lens, the reflection light of measurement mouth department gets into the sensor through the transmission of semi-reflection and semi-transmission device, the integrating sphere on the leaded light hole of seting up and semi-reflection and semi-transmission device between the cooperation be provided with light guide device and first shutter, the reflection light of integrating sphere internal surface gets into the sensor through the reflection of semi-reflection and semi-transmission device.

The lens is provided with an adjusting device for adjusting the position of the lens between the sensor and the detection hole and changing the size of the measurement area of the sensor.

The lens comprises a first lens and a second lens, the semi-reflecting and semi-transparent device is arranged between the first lens and the second lens, and the second lens is provided with an adjusting device for adjusting the position of the second lens between the semi-reflecting and semi-transparent device and the detection hole.

The adjusting device comprises a sliding sleeve, a sleeve deflector rod, a V-shaped spring, a fixing structure and a sliding sleeve arranged in the detection cylinder, the sliding sleeve is matched with the lens through a step-shaped notch formed in the inner side of the top of the sliding sleeve, a deflector rod hole formed in one side of the sliding sleeve is matched with a sliding groove formed in one side of the detection cylinder, the sleeve deflector rod penetrates through the sliding groove to be matched with the deflector rod hole in an inserting manner, the fixing structure arranged on the outer side of the detection cylinder is matched and connected with the sleeve deflector rod through the V-shaped spring, the V-shaped spring provides upward force for the upward-pulled sleeve deflector rod, so that the sliding sleeve is supported through the sleeve deflector rod, the distance between the lens and the sensor is shortened, the distance between the lens and the detection hole is increased, and the sliding; the downward force is provided for the downward shifting sleeve shifting rod to assist the sleeve shifting rod to better drive the sliding sleeve to slide downwards, so that the distance between the lens and the sensor is increased, and the distance between the lens and the detection hole is reduced; finally, the size of the area measured by the sensor from the measuring port is changed.

The light guide hole is arranged above the light through hole, and the light barrier is arranged below the inner side of the light through hole, so that light of the light source can be prevented from directly irradiating the measuring port, and reflected light of the measuring port can be prevented from irradiating the light guide hole.

The semi-reflecting and semi-transmitting device is obliquely arranged semi-reflecting and semi-transmitting glass, the upper surface of the semi-reflecting and semi-transmitting glass is a reflecting surface, and the lower surface of the semi-reflecting and semi-transmitting glass is a transmitting surface.

The integrating sphere is provided with a light trap hole, a measuring port and a camera outside the integrating sphere, and a shifting piece is arranged between the light trap hole and the camera.

The utility model discloses an advantage and beneficial effect lie in:

the intensity of the optical signal of the measured object and the light source can be measured only by one spectral sensor, the final sampling signal is obtained through calculation, the influence of the energy fluctuation of the light source on the stability of the measuring result is reduced, and the cost of the system is greatly reduced on the basis of ensuring the repeatability of the measurement.

Drawings

Fig. 1 is a sectional view of the structure of the present invention.

Fig. 2a is a sectional view of the adjusting device of the utility model in a part of the structure when upward.

Fig. 2b is a sectional view of the adjusting device of the present invention in a downward direction.

Fig. 3a is a schematic diagram of the structure of the outer side of the adjusting device in the utility model when the adjusting device is upward.

Fig. 3b is a schematic diagram of the outer side of the adjusting device in the downward direction of the utility model.

In the figure:

1. the device comprises a sensor, 2, a first shutter, 3, a light guide column, 4, a second shutter, 5, a detection hole, 6, an integrating sphere, 7, a light guide hole, 8, a light through hole, 9, a light source, 10, a light barrier, 11, a measurement port, 12, a light trap hole, 13, a shifting sheet, 14, a camera, 15, a second lens, 16, semi-reflecting and semi-transparent glass, 17, a first lens, 18, a detection cylinder, 19, a shifting rod hole, 20, a sleeve shifting rod, 21, a sliding groove, 22, a sliding sleeve, 23, a stepped notch, 24, a fixing screw, 25 and a V-shaped spring.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

As shown in fig. 1, light emitted from the LED light source 9 passes through the filter and enters the integrating sphere 6. The light is homogenized in the integrating sphere 6 without stopping, and then is irradiated to the surface of the object through the measuring port 11. The reflected light on the surface of the object sequentially passes through the measuring port 11, the detection hole 5, the second shutter 4, the second lens 15, the semi-reflecting and semi-transparent glass 16 and the first lens 17 to enter the spectrum sensor 1. In addition, a light guide hole 7 is formed in the integrating sphere 6, light (without object surface reflection light rays) on the inner surface of the integrating sphere 6 sequentially passes through the light guide hole 7, the light guide column 3, the first shutter 2 and the semi-reflective and semi-transparent glass 16 to enter the spectrum sensor 1, a reflection surface is arranged above the semi-reflective and semi-transparent glass 16 and is aligned with a light outlet of the light guide column 3, a transmission surface is arranged below the semi-reflective and semi-transparent glass 16 and is aligned with the second lens 15, and the whole semi-reflective and semi-transparent glass 16 is obliquely arranged.

As shown in fig. 2 and 3, the second lens 15 is provided with an adjusting device for adjusting the position of the lens between the sensor 1 and the detection hole 5 to change the size of the area measured by the sensor 1 from the measurement port 11.

The adjusting device comprises a sliding sleeve 22, a sleeve driving lever 20, a V-shaped spring 25 and a fixing screw 24, the sliding sleeve 22 is arranged on the inner wall of the detection barrel 18 in a matched mode, a step-shaped notch 23 is formed in the top of the sliding sleeve 22 and used for placing the second lens 15, a driving lever hole 19 is formed in one side of the sliding sleeve 22, a sliding groove 21 is formed in one side of the detection barrel 18 in a corresponding matched mode, one end of the sleeve driving lever 20 penetrates through the sliding groove 21 to be in inserting connection with the driving lever hole 19 in a matched mode, the fixing screw 24 is arranged on the outer side of the detection barrel 18, and the other end of the fixing screw 24 and the. When the sleeve shifting rod 20 is shifted upwards from the bottom of the sliding groove 21, the distance between the fixing screw 24 and the sleeve shifting rod 20 is shortened, so that the pressure on the V-shaped spring 25 is increased, after the sleeve shifting rod 20 crosses the middle of the sliding groove 21, the distance between the fixing screw 24 and the sleeve shifting rod 20 is increased, the pressure on the V-shaped spring 25 is reduced, and under the action of the self elastic force, an upward force is applied to the sleeve shifting rod 20, so that the sleeve shifting rod 20 slides to the top end of the sliding groove 21, the second lens 15 moves upwards through the sliding sleeve 22, the distance between the second lens 15 and the sensor 1 is reduced, the distance between the sensor 1 and the detection hole 5 is increased, and the size of an area measured by the sensor 1 from the measurement port 11 is changed; when the sleeve shifting rod 20 is shifted downwards from the top of the sliding groove 21, the distance between the fixing screw 24 and the sleeve shifting rod 20 is shortened, the pressure on the V-shaped spring 25 is increased, after the middle of the sliding groove 21 is crossed, the distance between the fixing screw 24 and the sleeve shifting rod 20 is increased, the pressure on the V-shaped spring 25 is reduced, under the action of the self elastic force, a downward force is applied to the sleeve shifting rod 20, the sleeve shifting rod 20 slides to the bottom end of the sliding groove 21, the second lens 15 moves downwards through the sliding sleeve 22, the distance between the second lens 15 and the sensor 1 is increased, the distance between the sensor 1 and the detection hole 5 is reduced, and the size of an area measured by the sensor 1 from the measurement port 11 is changed.

The outer side of the integrating sphere 6 is also provided with a camera 14, the measuring opening 11 is observed through a light trap hole 12 formed in one side of the top of the integrating sphere 6, a measuring area is displayed on a screen, a user can conveniently position the measuring area, and the light trap hole 12 is matched with a shifting piece 13 and used for realizing a de 8-degree measuring structure.

A first measurement process: the first shutter 2 is closed, the second shutter 4 is opened, at the moment, light rays are reflected by the surface of a measured object, then sequentially pass through the measuring port 11, the detecting hole 5, the second shutter 4 and the second lens 15, enter the reflecting surface from the transmission surface of the semi-reflecting and semi-transparent glass 16 to be emitted, and then enter the spectrum sensor 1 through the first lens 17, at the moment, signals measured by the spectrum sensor 1 are spectrum reflection signals of the surface of the object

。

Then entering a second measurement process: the first shutter 2 is opened, the second shutter 4 is closed, at the moment, the light (without the object surface reflection light rays) on the inner surface of the integrating sphere 6 passes through the light guide hole 7, the light guide column 3 and the first shutter 2 in sequence by the light guide column 3, is reflected by the reflection surface of the semi-reflecting and semi-transparent glass 16, enters the spectrum sensor 1 through the first lens 17, and at the moment, the signal measured by the spectrum sensor 1 enters the spectrum sensor 1

Is only related to the luminous intensity of the light source 9.

The baffle is arranged inside the integrating sphere 6 to ensure that the light reflected by the surface of the object to be measured does not directly enter the light guide column 3. The light guide hole 7 is arranged above the light through hole 8, a light barrier 10 is arranged below the inner side of the light through hole 8, and the light source 9 can be prevented from being driven by the light barrier 10The light is directly irradiated to the measuring port 11, and the reflected light of the measuring port 11 is prevented from being irradiated into the light guide hole 7 to reduce

Affected by the surface color of the object to be measured.

Get

As the final sampled signal.

Because the interval time between the first measurement process and the second measurement process is short, the opening or closing time of one shutter is only separated, which is about 10ms, the luminous intensity and the spectrum distribution of the luminous light source 9 can be considered not to change in the interval time, and the two measurement processes are carried out in the same state, so that the better measurement repeatability can be obtained, the use of two spectrum sensors is avoided, and the cost is greatly reduced.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. The utility model provides a double-optical-path beam split colorimeter, includes integrating sphere (6), light source (9) that sets up with light-passing hole (8) cooperation of integrating sphere (6) to and with measuring port (11), sensor (1) that detecting hole (5) cooperation set up of integrating sphere (6), its characterized in that detecting hole (5) and sensor (1) between the cooperation be provided with second shutter (4), half anti-semi-permeable device and lens, the reflection light of measuring port (11) department gets into sensor (1) through the transmission of half anti-semi-permeable device, integrating sphere (6) on set up leaded light hole (7) and half anti-semi-permeable device between the cooperation be provided with leaded light device and first shutter (2), the reflection light of integrating sphere (6) internal surface gets into sensor (1) through the reflection of half anti-semi-permeable device.

2. A dual-beam-path spectrocolorimeter according to claim 1 wherein said lens is provided with adjustment means for adjusting the position of the lens between the sensor (1) and the detection aperture (5).

3. A dual-beam-path spectrocolorimeter according to claim 2 wherein said lenses comprise a first lens (17) and a second lens (15), said transflective means being between said first lens (17) and said second lens (15), said second lens (15) being provided with adjustment means for adjusting the position of said second lens (15) between said transflective means and said detection aperture (5).

4. The dual-optical-path light-splitting color photometer as claimed in claim 2 or 3, wherein the adjusting device comprises a sliding sleeve (22), a sleeve shift lever (20), a V-shaped spring (25) and a fixing structure, the sliding sleeve (22) is arranged in the detection barrel (18) and is matched with the lens through a step-shaped notch (23) formed in the inner side of the top of the sliding sleeve, a shift lever hole (19) formed in one side of the sliding sleeve (22) is matched with a sliding groove (21) formed in one side of the detection barrel (18), the sleeve shift lever (20) penetrates through the sliding groove (21) to be in inserted fit with the shift lever hole (19), and the fixing structure is arranged on the outer side of the detection barrel (18) and is matched and connected with the sleeve shift lever (20) through the V-shaped spring (25).

5. A dual-beam-path spectrocolorimeter according to claim 1 wherein the light guide (7) is disposed above the light aperture (8) and a light barrier (10) is disposed below the inside of the light aperture (8).

6. The dual-optical-path spectrocolorimeter according to claim 1 wherein said transflective device is obliquely disposed transflective glass (16), said transflective glass (16) having a reflective surface on an upper surface thereof and a transmissive surface on a lower surface thereof.

7. The dual-optical-path spectrocolorimeter according to claim 1, wherein a light trap hole (12) formed in the integrating sphere (6) is matched with the measuring port (11) and a camera (14) outside the integrating sphere (6), and a shifting piece (13) is arranged between the light trap hole (12) and the camera (14).