Support for stabilizing detection light path
By designing an optical path bracket including a detection channel and a positioning and compression mechanism, the problems of sample position differences and insufficient optical path sealing are solved, and the stability and high accuracy of precision gas or liquid tests are achieved.
Patent Information
- Application Number
- CN202420992967.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-09
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-05-09
AI Technical Summary
Existing optical path holders are prone to positional differences when taking samples, resulting in large errors introduced in precision gas or liquid testing, and the optical path is insufficiently sealed and easily affected by stray light.
A bracket including a base, a detector fixing plate, a sample cell and a light source fixing plate are designed. Through the detection channel, the positioning and compression mechanism ensures the fixed position of the cuvette in the sample cell. The light blocking plate and the insertion interface are used to block the optical path, and the auxiliary support plate and the light shielding cap are used to enhance the stability of the optical path.
It effectively avoids errors caused by sample position differences, enhances the sealing of the optical path, reduces the influence of stray light, and ensures the stability and accuracy of the detection effect.
Smart Images
Figure CN222636051U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an optical path stabilizing bracket, in particular to a bracket used for stabilizing a detection optical path. Background Art
[0002] Stable optical path brackets are widely used in laser systems, optical microscopes, telescopes, laser processing equipment and other fields. For example, in near-infrared detection systems, the sample is placed in a cuvette, and a laser with a certain working wavelength forms an optical path and illuminates the cuvette, and then a detector is used to collect the signal. In this detection system, a stable optical path bracket is required to ensure that the position and posture of the optical components remain unchanged during use, providing stability and precision support for various optical systems.
[0003] However, existing bracket designs generally do not fully consider the direct connection with the light source and detector, resulting in insufficient airtightness of the optical path, which may be interfered by stray light, thus affecting the detection effect and information collection. In addition, most brackets do not take into account the differences between different positions of the sample when it is taken, which may introduce large errors in precision gas or liquid testing. Utility Model Content
[0004] The purpose of the utility model is to provide a bracket for stabilizing the detection light path, so as to solve the problem that the existing light path bracket is prone to position differences when taking samples, resulting in errors in testing.
[0005] The utility model is implemented as follows: a bracket for stabilizing a detection optical path, comprising a base, on which a detector fixing plate, a sample pool and a light source fixing plate are arranged, a detection channel is arranged between the detector fixing plate and the light source fixing plate, the detection channel passes through the sample pool, a placement cavity is opened downward on the top surface of the sample pool, a cuvette is arranged in the placement cavity, two positioning and clamping mechanisms arranged at right angles are arranged on the side wall of the sample pool, and the positioning and clamping mechanisms are perpendicular to the inner wall of the sample pool, and the positioning and clamping mechanisms are used to press the cuvette placed in the sample pool against the inner wall of the sample pool.
[0006] As a further improvement of the bracket for stabilizing the detection light path of the utility model, the positioning and clamping mechanism includes a cylinder, a spring is arranged in the cylinder, a ball is arranged at the inner end of the spring, and the outer end of the spring is fixed to the cylinder.
[0007] As a further improvement of the support for stabilizing the detection light path of the utility model, a pin is plugged into the cylinder, and the pin is used to locate the outer end position of the spring.
[0008] As a further improvement of the bracket for stabilizing the detection light path of the utility model, a light blocking plate is arranged on one end of the detection channel close to the light source fixing plate, and an insertion port is opened on the detection channel, and the light blocking plate is plugged into the insertion port.
[0009] As a further improvement of the bracket for stabilizing the detection optical path of the utility model, it also includes an auxiliary support plate, which is located on one side of the plug interface, and the detection channel passes through the middle of the auxiliary support plate, and the lower part of the auxiliary support plate is connected to the base.
[0010] As a further improvement of the support for stabilizing the detection optical path of the utility model, grooves are provided on two side walls of the placement cavity in the length direction of the detection channel.
[0011] As a further improvement of the support for stabilizing the detection light path of the utility model, it also includes a light shielding cap, and the light shielding cap is arranged on the top of the sample pool.
[0012] As a further improvement of the support for stabilizing the detection light path of the utility model, a plurality of bolt penetration holes are provided on the detector fixing plate.
[0013] The detection channel of the utility model is designed with a long optical path, with the detector and the sample pool on the left and the optical path baffle and the light source on the right, which can minimize the influence of external stray light on detection. Two vertical forces are applied to the cuvette placed in the sample pool through two positioning and clamping mechanisms arranged at right angles, thereby ensuring that the cuvette is in the same position of the sample pool each time it is placed.
[0014] At the same time, grooves are respectively provided on both sides of the light-transmitting surface of the sample cell, so as to ensure that the light-transmitting surface of the cuvette will not be contaminated due to friction when the cuvette is placed into the sample cell or taken out of the sample cell.
[0015] The light blocking plate is inserted into the detection channel and can be flexibly pulled out to block the light path collection at any time.
[0016] The utility model has a simple structure, can ensure the airtightness of the optical path, avoid interference from stray light, and at the same time, can ensure that there will be no position difference when taking the sample, thereby ensuring that no large error is introduced in the precision gas or liquid test. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the utility model.
[0018] Figure 2 It is a left view of the utility model.
[0019] Figure 3 yes Figure 1 AA view.
[0020] Figure 4 It is a structural principle diagram of the positioning and pressing mechanism of the utility model.
[0021] In the figure: 1. base; 2. detector fixing plate; 3. sample pool; 4. detection channel; 5. auxiliary support plate; 6. light source fixing plate; 7. positioning and clamping mechanism; 8. cuvette; 9. light shielding cap; 10. light shielding plate; 2-1. bolt through hole; 3-1. placement cavity; 3-2. groove; 7-1. cylinder; 7-2. spring; 7-3. pin; 7-4. ball bearing. DETAILED DESCRIPTION
[0022] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.
[0023] like Figures 1 to 4 As shown, the utility model is a bracket for stabilizing the detection light path, including a base 1, on which a detector fixing plate 2, a sample pool 3 and a light source fixing plate 6 are arranged, a detection channel 4 is arranged between the detector fixing plate 2 and the light source fixing plate 6, the detection channel 4 passes through the sample pool 3, and a placement cavity 3-1 is opened downward from the top surface of the sample pool 3, the inner cavity of the detection channel 4 is connected with the inner cavity of the placement cavity 3-1, and a cuvette 8 is arranged in the placement cavity 3-1.
[0024] When in use, a light source or a fiber optic collimator is connected to the light source fixing plate 6, and the detector is fixedly installed on the detector fixing plate 2. The light path passes through the detection channel 4 and through the placement cavity 3-1 of the sample pool 3. When passing through the placement cavity 3-1, the light path passes vertically through the placement cavity 3-1.
[0025] The placement cavity 3 - 1 is rectangular, two side surfaces of the placement cavity 3 - 1 are parallel to the length direction of the detection channel 4 , and the other two side surfaces are perpendicular to the length direction of the detection channel 4 .
[0026] The main cross-section of the cuvette 8 is also rectangular, and when the side of the cuvette 8 is against the side of the placement cavity 3-1, it can ensure that the light path passes vertically through the cuvette 8. However, in order to facilitate the removal of the cuvette 8, the placement cavity 3-1 is slightly larger than the cuvette 8, which results in that after the cuvette 8 is placed in the placement cavity 3-1, it is impossible to ensure that the side of the cuvette 8 can be against the inner wall of the placement cavity 3-1, and it is also impossible to ensure that the position of the cuvette 8 is determined each time it is placed, and it is also impossible to ensure that the light path is perpendicular to the side wall of the cuvette 8.
[0027] Therefore, two positioning and pressing mechanisms 7 arranged at right angles are provided on the side wall of the sample pool 3, and the positioning and pressing mechanisms 7 are perpendicular to the inner wall of the sample pool 3. The two positioning and pressing mechanisms 7 simultaneously press the cuvette 8 from two mutually perpendicular directions, so that the cuvette 8 placed in the sample pool 3 is pressed against the inner wall of the sample pool 3, and the placement position of the cuvette 8 is determined each time.
[0028] The two positioning and clamping mechanisms 7 ensure that all samples are located at the same position in the sample pool 3 during measurement, thereby reducing errors caused by different positions of the cuvette 8 placed in the sample pool 3 .
[0029] The positioning and pressing mechanism 7 comprises a cylinder 7-1, a spring 7-2 is arranged inside the cylinder 7-1, a ball 7-4 is arranged at the inner end of the spring 7-2, and the outer end of the spring 7-2 is fixed on the cylinder 7-1.
[0030] Under the elastic force of the spring 7-2, the front end portion of the ball 7-4 is located in the placement cavity 3-1. When the cuvette 8 is placed downward into the placement cavity 3-1, the spring 7-2 is compressed by squeezing the ball 7-4, and the restoring force of the spring 7-2 reacts on the cuvette 8, thereby pressing the cuvette 8 against the side wall of the placement cavity 3-1.
[0031] In order to prevent the ball 7-4 from escaping from the port of the cylinder 7-1 into the placement cavity 3-1, the inner port of the cylinder 7-1 is set to a contraction structure. When the cuvette 8 is not placed in the placement cavity 3-1, the spring 7-2 pushes the ball 7-4 to the inner port of the cylinder 7-1, and the contraction structure limits the ball 7-4. At this time, the minimum distance from the ball 7-4 to the opposite surface of the placement cavity 3-1 is less than the width of the cuvette 8, so that pressure can be generated against the cuvette 8 after the cuvette 8 is placed.
[0032] The outer end of the spring 7-2 is relatively fixed to the cylinder 7-1. The outer end of the cylinder 7-1 can be sealed, or the outer surface of the spring 7-2 can be directly or indirectly fixed to the cylinder 7-1. In this specific embodiment, the outer end of the spring 7-2 is fixed by the way of limiting the position of the latch 7-3. That is, the cylinder 7-1 is plugged with the latch 7-3, and the outer end of the spring 7-2 contacts the latch 7-3, and the position of the spring 7-2 is limited by the latch 7-3.
[0033] The latch 7-3 passes through the side wall of the cylinder 7-1 along the diameter direction of the cylinder 7-1, and multiple latches 7-3 can be provided to limit the spring 7-2 at the same time.
[0034] When the cuvette 8 is taken up and down, friction will occur between the side of the cuvette 8 and the inner wall of the placement cavity 3-1, and the friction will cause scratches and other contamination on the surface of the cuvette 8. Once scratches appear, the light path will be affected. Therefore, as a further improvement of the bracket for stabilizing the detection light path of the utility model, grooves 3-2 are opened on the two side walls of the placement cavity 3-1 in the length direction of the detection channel 4. Both grooves 3-2 are located in the direction of the light path, so that when the cuvette 8 is taken up, friction contamination between the part where the light path passes and the inner wall of the placement cavity 3-1 can be avoided.
[0035] At the same time, in order to avoid friction contamination caused by the contact between the cuvette 8 and the positioning and clamping mechanism 7, the positioning and clamping mechanism 7 with the same direction as the optical path is arranged below the detection channel 4, so that scratches caused by the friction between the cuvette 8 and the positioning and clamping mechanism 7 will only appear below the part through which the optical path passes, and will not affect the optical path.
[0036] The detection channel 4 has a certain length, so that a long light path is formed when the light passes through, ensuring that the light path penetrates the sample vertically.
[0037] The optical fiber collimator can be fixed on the light source fixing plate 6 to ensure that the light spot will not diverge. The energy utilization efficiency of the collimated light is high, and the collected information is more accurate.
[0038] The detector fixing plate 2 is directly connected to the sensor of the detector. The photosensitive area of the sensor is the same as the area of the optical fiber outgoing light, and the outgoing light can be completely received, thereby increasing the energy utilization efficiency.
[0039] As a further improvement of the bracket for stabilizing the detection light path of the utility model, a light blocking plate 10 is provided at one end of the detection channel 4 close to the light source fixing plate 6, and a plug interface is provided on the detection channel 4, and the light blocking plate 10 is plugged into the plug interface. The light blocking plate 10 can block the light path collection at any time.
[0040] At the same time, the utility model also includes an auxiliary support plate 5, which is located on one side of the plug interface, and the detection channel 4 passes through the middle of the auxiliary support plate 5, and the lower part of the auxiliary support plate 5 is connected to the base 1. The auxiliary support plate 5 can assist in supporting the detection channel 4 on the one hand, and on the other hand, it serves as a guide surface for the light blocking plate 10. The plug interface is located at the connection between the auxiliary support plate 5 and the detection channel 4, and the light blocking plate 10 is attached to the surface of the auxiliary support plate 5. The light blocking plate 10 is pulled up and down along the surface of the auxiliary support plate 5 to achieve blocking and recovery of the light path.
[0041] The utility model further comprises a light shielding cap 9 which is arranged on the top of the sample pool 3 . The light shielding cap 9 covers the top of the sample pool 3 , thereby preventing external light from entering the detection channel 4 from the top of the sample pool 3 .
[0042] A plurality of bolt penetration holes 2 - 1 are provided on the detector fixing plate 2 , and the detector is fixed through the bolt penetration holes 2 - 1 .
[0043] The utility model can ensure the sealing of the optical path and reduce the influence of external stray light on detection. The positioning and clamping mechanism 7 can ensure that the cuvette 8 can maintain the same posture every time. The groove 3-2 on the side of the sample pool 3 can ensure that the light-transmitting surface is not contaminated when the cuvette 8 is taken and placed, thereby ensuring the stability and accuracy of the detection.
Claims
1. A bracket for stabilizing a detection optical path, characterized in that: The invention comprises a base, on which a detector fixing plate, a sample pool and a light source fixing plate are arranged, a detection channel is arranged between the detector fixing plate and the light source fixing plate, the detection channel passes through the sample pool, a placement cavity is opened downward on the top surface of the sample pool, a cuvette is arranged in the placement cavity, two positioning and clamping mechanisms arranged at right angles are arranged on the side wall of the sample pool, and the positioning and clamping mechanisms are perpendicular to the inner wall of the sample pool, and the positioning and clamping mechanisms are used to press the cuvette placed in the sample pool against the inner wall of the sample pool.
2. The bracket for stabilizing the detection optical path according to claim 1, characterized in that: The positioning and pressing mechanism comprises a cylinder, a spring is arranged in the cylinder, a ball is arranged at the inner end of the spring, and the outer end of the spring is fixed on the cylinder.
3. The bracket for stabilizing the detection optical path according to claim 2, characterized in that: A latch is inserted into the cylinder, and the latch is used to locate the outer end position of the spring.
4. The bracket for stabilizing the detection optical path according to claim 1, characterized in that: A light blocking plate is arranged at one end of the detection channel close to the light source fixing plate, and a plug-in interface is provided on the detection channel, and the light blocking plate is plugged into the plug-in interface.
5. The bracket for stabilizing the detection optical path according to claim 4, characterized in that: It also includes an auxiliary support plate, which is located on one side of the plug interface, and the detection channel passes through the middle of the auxiliary support plate, and the lower part of the auxiliary support plate is connected to the base.
6. The bracket for stabilizing the detection optical path according to claim 1, characterized in that: Grooves are provided on two side walls of the placement cavity in the length direction of the detection channel.
7. The bracket for stabilizing the detection optical path according to claim 1, characterized in that: It also includes a light shielding cap, which is arranged on the top of the sample pool.
8. The bracket for stabilizing the detection optical path according to claim 1, characterized in that: A plurality of bolt penetration holes are provided on the detector fixing plate.