A device for measuring the angular characteristics of a standard lamp with luminous intensity

Abstract

This utility model discloses a device for measuring the angular characteristics of a standard lamp with luminous intensity, belonging to the technical field of optical measurement. It includes a photometric guide rail, an adjustable lamp holder, an angle-rotating system, and an aperture. The fixed end of the adjustable lamp holder is mounted on the photometric guide rail, and the movable end of the adjustable lamp holder is used to mount the standard lamp under test. The fixed end of the angle-rotating system is mounted on the photometric guide rail, and the movable end of the angle-rotating system is used to mount a detector. The angle-rotating system can adjust the horizontal and vertical deflection angles of the detector. The aperture is mounted on the photometric guide rail and located between the adjustable lamp holder and the angle-rotating system. This utility model utilizes the angle-rotating system to mount the detector and adjusts the horizontal and vertical deflection angles of the detector during the measurement process, enabling the measurement of the angular characteristics of various types of standard lamps under test.

Description

Technical Field

[0001] This utility model relates to the technical field of optical measurement, and in particular to a device for measuring the angular characteristics of a standard lamp with luminous intensity. Background Technology

[0002] In the field of optical radiation metrology, the candela (cd), the unit of luminous intensity, is one of the seven base units of the International System of Units (SI). The accurate reproduction and transmission of its value relies on highly stable luminous intensity standard lamps. These standard lamps, through precise optical design (such as planar luminous body structure, specific glass shell shape, and aperture system), effectively suppress stray light interference, ensuring uniform light field distribution in a given luminous direction. They are widely used in the value transmission and calibration of equipment such as luminance meters and illuminance meters, and are the core carrier for ensuring accurate luminous intensity values ​​and unit consistency.

[0003] The metrological performance of traditional luminous intensity standard lamps is mainly reflected in three core parameters: the stability of the standard lamp after 4 hours of aging, angular characteristics (including horizontal / vertical directions), and the rate of change of luminous intensity value. Among them, angular characteristics directly affect the measurement uncertainty introduced during the standard lamp assembly and adjustment process. If the angular characteristics are excellent, the systematic error caused by the uneven spatial distribution of the light source can be significantly reduced, thereby improving the accuracy of the photometric value traceability chain.

[0004] For angular characteristic measurements, a special lamp holder equipped with a precision dial is required. This holder uses dual-axis horizontal / vertical rotation adjustment to ensure strict alignment between the center of the standard lamp and the horizontal axis of the photometric measuring device. However, this traditional lamp holder design has significant limitations: its mechanical structure is only compatible with the geometric dimensions and optical center height requirements of a limited number of early standard lamp models such as BDQ3, BDQ7, and BDQ8. With the development of metrology technology, the number of current standard lamp models has expanded to 18, with significant differences in power range, dimensions, and optical characteristics. This means that traditional lamp holders cannot meet the angular characteristic measurement needs of multiple standard lamp models, severely restricting the expansion and application of modern optical metrology systems.

[0005] Therefore, how to solve the compatibility problem of multiple standard lamp models is a technical problem that needs to be solved. Utility Model Content

[0006] The purpose of this invention is to provide a device for measuring the angular characteristics of a standard lamp with luminous intensity, in order to solve the problems existing in the prior art. It uses a rotating system to install the detector and adjusts the horizontal and vertical deflection angles of the detector during the measurement process, which can meet the angular characteristic measurement of various types of standard lamps.

[0007] To achieve the above objectives, this utility model provides the following solution:

[0008] This utility model provides a device for measuring the angular characteristics of a standard lamp with luminous intensity, including a photometric guide rail, an adjustable lamp holder, an angle-rotating system, and an aperture. The fixed end of the adjustable lamp holder is mounted on the photometric guide rail, and the movable end of the adjustable lamp holder is used to mount the standard lamp being measured. The fixed end of the angle-rotating system is mounted on the photometric guide rail, and the movable end of the angle-rotating system is used to mount a detector. The angle-rotating system can adjust the horizontal and vertical deflection angles of the detector. The aperture is mounted on the photometric guide rail and is located between the adjustable lamp holder and the angle-rotating system.

[0009] In one embodiment, the test plane of the detector is parallel to the filament plane of the standard lamp under test and perpendicular to the measurement axis of the photometric guide. The center point of the test plane and the filament plane is located on the measurement axis, and the vertical rotation axis and the horizontal rotation axis of the filament plane are both perpendicular to the measurement axis.

[0010] In one embodiment, the cornering system includes a base, a lifting structure, and a displacement assembly. The base is mounted on the photometric guide rail. The fixed end of the lifting structure is connected to the base. The displacement assembly includes a horizontal displacement stage, a rotary displacement stage, and a pitch displacement stage. The movable end of the lifting structure is connected to the fixed end of the horizontal displacement stage. The movable end of the horizontal displacement stage is connected to the fixed end of the rotary displacement stage. The movable end of the rotary displacement stage is connected to the fixed end of the pitch displacement stage. The movable end of the pitch displacement stage is connected to a clamp for mounting the detector.

[0011] In one embodiment, the horizontal displacement stage includes a first fixed part, a first movable part, and a first driving assembly. The first fixed part is disposed at the movable end of the lifting structure, and the first movable part is movably disposed on the first fixed part. The first driving assembly includes a first abutting part and a first pushing structure. The first abutting part is connected to the first movable part, and the first pushing structure is connected to the first fixed part. The first pushing structure is used to push the first abutting part to move.

[0012] In one embodiment, the rotary displacement stage includes a second fixed part, a second movable part, and a second driving assembly. The second fixed part is disposed on the first movable part and rotatably connected to the second fixed part. The second driving assembly includes a second abutting part and a second pushing structure. The second abutting part is connected to the second movable part. Two second pushing structures are provided, and the two second pushing structures are respectively disposed on both sides of the second abutting part. The second pushing structures are used to push the second abutting part to rotate horizontally.

[0013] In one embodiment, the pitch displacement stage includes a third fixed part, a third movable part, and a third drive assembly. The third fixed part is disposed on the second movable part and rotatably connected to the third fixed part. The third drive assembly includes a third abutting part and a third pushing structure. The third abutting part is connected to the third movable part, and the third pushing structure is connected to the third fixed part. The third pushing structure is used to push the third abutting part to pitch and rotate.

[0014] In one embodiment, the fixture includes a clamping frame and a set screw. The clamping frame is connected to the third movable part. The interior of the clamping frame is provided with a V-shaped placement groove for placing the detector. The set screw is threaded to the top of the clamping frame and passes through the clamping frame to abut against the detector.

[0015] In one embodiment, at least two apertures are provided, and the two or more apertures are arranged sequentially. The aperture of the aperture gradually decreases from the standard lamp being tested towards the detector until it matches the probe of the detector.

[0016] In one embodiment, an adjustment system is also included, comprising a collimating light source, coordinate paper, and a level. The collimating light source emits parallel light rays that are projected onto the coordinate paper, forming a reference line on the coordinate paper. By moving and adjusting the standard lamp under test and the detector, the projections of the test plane of the detector and the filament plane of the standard lamp under test onto the coordinate paper are made parallel to the reference line, respectively.

[0017] The present invention achieves the following technical advantages over the prior art:

[0018] This invention features an adjustable lamp holder and a cornering system mounted on a photometric guide rail. The cornering system is used to mount the detector, while the adjustable lamp holder is used to mount the standard lamp under test. During the measurement process, the horizontal and vertical deflection angles of the detector are adjusted via the cornering system. This reduces the requirements for the adjustable lamp holder, transferring the deflection angle adjustment function from the adjustable lamp holder to the cornering system. Consequently, the adjustable lamp holder no longer needs to meet both the installation requirements of the standard lamp under test and the deflection angle adjustment requirements, thus improving the versatility of testing the standard lamp under test and enabling the measurement of the angular characteristics of various types of standard lamps under test. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram illustrating the structural arrangement of the measuring device in an embodiment of this utility model.

[0021] Figure 2 This is a schematic diagram of the optical path of the measuring device in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram showing the positional relationship of the measuring device in an embodiment of this utility model;

[0023] Figure 4 This is a schematic diagram of the angle-turning system and the photometric guide rail in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the corner system in an embodiment of the present invention;

[0025] Figure 6 This is a schematic diagram of the clamp in an embodiment of the present utility model;

[0026] Figure 7 This is a schematic diagram of the first angle of the horizontal displacement stage in an embodiment of this utility model;

[0027] Figure 8 This is a schematic diagram of the second angle of the horizontal displacement stage in an embodiment of this utility model;

[0028] Figure 9 This is a schematic diagram of the rotary displacement stage in an embodiment of the present invention;

[0029] Figure 10 This is a schematic diagram of the first angle of the pitch displacement stage in an embodiment of this utility model;

[0030] Figure 11 This is a schematic diagram of the second angle of the pitch displacement stage in an embodiment of this utility model;

[0031] The components include: 1. Corner system; 2. Adjustable lamp holder; 3. Aperture; 4. Detector; 5. Standard lamp under test; 6. Adjustment system; 7. Measuring guide rail; 8. Fixture.

[0032] 11. Base; 12. Lifting structure; 13. Horizontal displacement stage; 14. Rotary displacement stage; 15. Pitch displacement stage;

[0033] 131. First fixed part; 132. First movable part; 133. First drive assembly; 1331. First abutting part; 1332. First pushing structure; 134. First limiting structure; 1341. First fixed structure; 1342. First movable structure;

[0034] 141. Second fixed part; 142. Second movable part; 143. Second drive assembly; 1431. Second abutting part; 1432. Second pushing structure;

[0035] 151. Third fixing part; 152. Third moving part; 153. Third drive assembly; 1531. Third abutting part; 1532. Third pushing structure; 154. Second limiting structure; 1541. Second fixing structure; 1542. Second moving structure;

[0036] 31. First aperture; 32. Second aperture;

[0037] 61. Level instrument; 62. Collimating light source; 63. Graph paper;

[0038] 81. Mounting frame; 82. Set screw. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] The purpose of this invention is to provide a device for measuring the angular characteristics of a standard lamp with luminous intensity, in order to solve the problems existing in the prior art. It uses a rotating system to install the detector and adjusts the horizontal and vertical deflection angles of the detector during the measurement process, which can meet the angular characteristic measurement of various types of standard lamps.

[0041] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] like Figures 1 to 11 As shown, this utility model provides a device for measuring the angular characteristics of a standard lamp with luminous intensity, including a photometric guide rail 7, an adjustable lamp holder 2, an angle-rotating system 1, and an aperture 3. The fixed end of the adjustable lamp holder 2 is mounted on the photometric guide rail 7, and the movable end of the adjustable lamp holder 2 is used to mount the standard lamp 5 to be measured. The adjustable lamp holder 2 can move on the photometric guide rail 7 and can be adjusted to a certain extent in spatial orientation to meet the positional requirements of the standard lamp 5 to be measured. The fixed end of the angle-rotating system 1 is mounted on the photometric guide rail 7, and the movable end of the angle-rotating system 1 is used to mount a detector 4. The angle-rotating system 1 can move on the photometric guide rail 7 and can adjust the horizontal and vertical deflection angles of the detector 4 to meet the angular variation requirements when measuring the standard lamp 5 to be measured. The aperture 3 is mounted on the photometric guide rail 7 and is located between the adjustable lamp holder 2 and the angle-rotating system 1 to prevent stray light from entering the detector 4 and improve the accuracy of the measurement results.

[0043] This invention features an adjustable lamp holder 2 and an angle system 1 mounted on a light-measuring guide rail 7. The angle system 1 is used to mount a detector 4, and the adjustable lamp holder 2 is used to mount the standard lamp 5 under test. During measurement, the angle system 1 adjusts the horizontal and vertical deflection angles of the detector 4, reducing the requirements on the adjustable lamp holder 2. The function of angle adjustment is transferred from the adjustable lamp holder 2 to the angle system 1, eliminating the need for the adjustable lamp holder 2 to meet both the installation requirements of the standard lamp 5 and the angle adjustment requirements. This improves the versatility of testing the standard lamp 5, allowing for the measurement of the angular characteristics of various models of standard lamps 5. It also avoids the need for separately designed special lamp holders for different models of luminous intensity standard lamps, reducing measurement costs.

[0044] In one implementation, such as Figure 2 and Figure 3 As shown, by adjusting the angle system 1 and the adjustable lamp holder 2, the test plane of the detector 4 is made parallel to the filament plane of the standard lamp 5 under test, and perpendicular to the measurement axis of the photometric guide rail 7. The center point of the test plane and the filament plane is located on the measurement axis, and both the vertical and horizontal rotation axes of the filament plane are perpendicular to the measurement axis. The precise relative positional relationship between the detector 4 and the standard lamp 5 under test further ensures the accuracy of the final measurement result.

[0045] In one implementation, such as Figure 5 As shown, the cornering system 1 includes a base 11, a lifting structure 12, and a displacement assembly. The base 11 is mounted on a photometering guide rail 7 and can roll or slide on the guide rail 7, and can lock its position. The fixed end of the lifting structure 12 is connected to the base 11, and the movable end of the lifting structure 12 can be raised or lowered relative to the base 11. The lifting structure 12 can be a lead screw and nut structure or a telescopic rod structure. The displacement assembly includes a horizontal displacement platform 13, a rotary displacement platform 14, and a pitch displacement platform 15. The movable end of the lifting structure 12 is connected to the fixed end of the horizontal displacement platform 13, so that the horizontal displacement platform 13 can be driven to move up and down by operating the lifting structure 12. The movable end of the horizontal displacement platform 13 is connected to the fixed end of the rotary displacement platform 14, so that the rotary displacement platform 14 can be driven to move horizontally by operating the horizontal displacement platform 13. The movable end of the rotary displacement platform 14 is connected to the fixed end of the pitch displacement platform 15, so that the pitch displacement platform 15 can be driven to move around by operating the rotary displacement platform 14. The movable end of the pitch displacement stage 15 is connected to a clamp 8, which is used to mount the detector 4. Thus, by manipulating the pitch displacement stage 15, the detector 4 can be driven to move in pitch. Therefore, by manipulating the various components of the displacement assembly, the detector 4 can be controlled to move horizontally, rotate, and pitch, thereby adjusting the spatial position and angle of the detector 4, which is convenient for position adjustment and angle adjustment during testing.

[0046] In one implementation, such as Figure 7 and Figure 8 As shown, the horizontal displacement stage 13 includes a first fixed part 131, a first movable part 132, and a first drive assembly 133. The first fixed part 131 is disposed at the movable end of the lifting structure 12, and the first movable part 132 is movably disposed on the first fixed part 131. The first movable part 132 may be provided with a U-shaped groove, and the first fixed part 131 is provided with a protrusion that matches the U-shaped groove to guide the movement of the first movable part 132. The first drive assembly 133 includes a first abutting part 1331 and a first pushing structure 1332. The first abutting part 1331 is connected to the first movable part 132, and the first pushing structure 1332 is connected to the first fixed part 131. When the first pushing structure 1332 pushes, it can push the first abutting part 1331 to move, thereby pushing the first movable part 132 to move. The first jacking structure 1332 can be in the form of a screw. When the screw is rotated, it can be converted into axial movement of the screw to achieve the jacking action. To further improve accuracy, the screw pitch parameter can be designed accordingly, for example, a micrometer screw can be used.

[0047] In one implementation, such as Figure 7 As shown, the horizontal displacement stage 13 also includes a first limiting structure 134. The first limiting structure 134 includes a first fixing structure 1341 installed on the first fixing part 131 and a first movable structure 1342 installed on the first movable part 132. The first fixing structure 1341 is provided with a first guide hole, and the first movable structure 1342 has a first sliding structure that slides in the first guide hole. The first guide hole is linear and can constrain the movement trajectory of the first movable structure 1342.

[0048] In one implementation, such as Figure 9As shown, the rotary displacement stage 14 includes a second fixed part 141, a second movable part 142, and a second drive assembly 143. The second fixed part 141 is disposed on the first movable part 132. The second movable part 142 is rotatably (horizontally) connected to the second fixed part 141. The second movable part 142 and the second fixed part 141 are coaxially arranged and may be provided with concentric bosses and grooves to guide the rotation direction of the second movable part 142. The second drive assembly 143 includes a second abutment portion 1431 and a second push structure 1432. The second abutment portion 1431 is connected to the second movable portion 142. Two second push structures 1432 can be provided, respectively located on opposite sides of the second abutment portion 1431. One of the second push structures 1432 can push the second abutment portion 1431 to rotate horizontally, thereby achieving horizontal rotation of the second movable portion 142. The other second push structure 1432 can have the same structure as the first one. During operation, the two need to move in coordination. The other second push structure 1432 can also be an elastic component (e.g., a spring) to consistently provide abutment and clamping force. The second push structure 1432 can be in the form of a screw. When the screw is rotated, it can be converted into axial movement of the screw to achieve the pushing action. To further improve accuracy, the screw pitch parameter can be designed accordingly, for example, using a micrometer screw.

[0049] In one implementation, such as Figure 10 and Figure 11 As shown, the pitch displacement stage 15 includes a third fixed part 151, a third movable part 152, and a third drive assembly 153. The third fixed part 151 is disposed on the second movable part 142. The third movable part 152 is rotatably (vertically rotated, i.e., pitched) connected to the third fixed part 151. The rotation direction is guided between the third movable part 152 and the third fixed part 151 through the cooperation of an arc-shaped boss and an arc-shaped groove. The third drive assembly 153 includes a third abutting part 1531 and a third pushing structure 1532. The third abutting part 1531 is connected to the third movable part 152, and the third pushing structure 1532 is connected to the third fixed part 151. When the third pushing structure 1532 pushes, it can push the third abutting part 1531 to move, thereby pushing the third movable part 152 to pitch and rotate. The third jacking structure 1532 can be in the form of a screw. When the screw is rotated, it can be converted into axial movement of the screw to achieve jacking action. To further improve accuracy, the screw pitch parameter can be designed accordingly, for example, a micrometer screw can be used.

[0050] In one implementation, such as Figure 10As shown, the pitch displacement stage 15 also includes a second limiting structure 154. The second limiting structure 154 includes a second fixing structure 1541 installed on the third fixing part 151 and a second movable structure 1542 installed on the third movable part 152. The second fixing structure 1541 is provided with a second guide hole, and the second movable structure 1542 has a second sliding structure that slides in the second guide hole. The second guide hole is arc-shaped and can constrain the movement trajectory of the second movable structure 1542.

[0051] The rotation system 1 of this invention features a rotary displacement stage 14 capable of rotating from 0 to 180°, and a pitch displacement stage 15 capable of rotating at a pitch angle of ±6°. By employing a micrometer-like micrometer screw, minute displacement changes can be achieved through the rotation of the micrometer screw, thereby influencing minute angle changes and enabling precise adjustment. Both the rotary displacement stage 14 and the pitch displacement stage 15 can also be equipped with angle scales to display the rotation angle value.

[0052] In one implementation, such as Figure 6 As shown, the fixture 8 includes a clamping frame 81 and a set screw 82. The clamping frame 81 is connected to the third movable part 152. The interior of the clamping frame 81 is provided with a V-shaped placement groove for placing the detector 4. The set screw 82 is threaded to the top of the clamping frame 81 and passes through the clamping frame 81 to abut against the detector 4. Thus, the V-shaped placement groove and the set screw 82 form a three-point positioning, which can accurately and stably position the detector 4.

[0053] In one implementation, such as Figure 3 As shown, at least two aperture stops 3 are provided, and two or more aperture stops 3 are arranged sequentially. The more aperture stops 3 there are, the less stray light will affect the system. The aperture of the aperture stops 3 gradually decreases from the standard lamp 5 being measured towards the detector 4 until it matches the probe of the detector 4. For example, at least a first aperture stop 31 with a large aperture and a second aperture stop 32 with a small aperture are provided.

[0054] In one implementation, such as Figure 1 and Figure 2 As shown, it also includes an adjustment system 6, which is used to adjust the position of the detector 4 mounted on the corner system 1 and the standard lamp 5 mounted on the adjustable lamp holder 2. The adjustment system 6 includes a collimating light source 62, coordinate paper 63, and a level 61. The collimating light source 62 emits parallel light rays that are projected onto the coordinate paper 63, forming a reference line on the coordinate paper 63. By axially moving and adjusting the standard lamp 5 and the detector 4 on the photometric guide rail 7, the projections of the test plane of the detector 4 and the filament plane of the standard lamp 5 onto the coordinate paper 63 are made parallel to or coincide with the reference line, thereby making the test plane and the filament plane parallel to each other.

[0055] Refer again Figures 1 to 11As shown, this utility model provides a method for measuring the angular characteristics of a luminous intensity standard lamp, which can be applied to the luminous intensity standard lamp angular characteristic measuring device described above, and includes the following steps:

[0056] S1. An adjustable lamp holder 2, an aperture 3, and a corner system 1 are sequentially set on the light metering guide rail 7. The standard lamp 5 to be measured is installed on the adjustable lamp holder 2, and a detector 4 is installed on the corner system 1. The detector 4 is a photometer, which is an instrument for measuring the total luminous flux per unit area. Its measurement unit is lux (lx), and the instrument value is proportional to the luminous intensity of the lamp.

[0057] S2. Keep the current of the standard lamp 5 under test constant, measure the reading m of detector 4, and then rotate detector 4 horizontally by ±1.5° to measure the corresponding reading m. 1.5水平 ;

[0058] S3. Calculate the horizontal change in luminous intensity δ_level using the following formula:

[0059]

[0060] S4. Rotate detector 4 vertically by ±1.5° and measure the corresponding reading m. 1.5竖直 ;

[0061] S5. Calculate the horizontal change in luminous intensity δ (vertical) using the following formula:

[0062]

[0063] Based on the corresponding calculation structure, it is possible to evaluate whether the tested standard lamp 5 meets the corresponding requirements.

[0064] In step S1, the measuring device performs the following operations or meets the following requirements:

[0065] 1) The length of the light metering guide rail 7 should preferably be more than 5 meters, with good straightness, and the outer surface of the measuring device should be blackened.

[0066] 2) Use the adjustment system 6 (including level 61, collimating light source 62 and coordinate paper 63) to adjust the standard lamp 5 and detector 4 to build an adjustment device; in addition to level 61, a height comparator can also be used. During measurement, the optical center of level 61 is transferred to the height comparator, and then the center of the filament plane is adjusted to be in the same position as the center of the height comparator through the height comparator. Similarly, the center of detector 4 can also be adjusted.

[0067] 3) Adjust the filament plane of the standard lamp 5 to be tested and the test plane of the detector 4 to be parallel, so that they are perpendicular to the measurement axis of the photometric guide rail 7, their center point is on the measurement axis, and the vertical and horizontal rotation axes of the filament plane are both perpendicular to the measurement axis.

[0068] 4) Fix the distance between the detector 4 and the standard lamp 5 to be measured and place two or more apertures 3 between them to prevent stray light from entering the detector 4. Connect the detector 4 to the digital display and pre-illuminate it for half an hour to stabilize the reading.

[0069] In one embodiment, in the adjustment system 6, the collimating light source 62 uses a high-brightness LED chip. The light emitted passes through a collimator and is projected as parallel light onto the coordinate paper 63. The coordinate paper 63 is attached above the photometric guide rail 7, and the parallel light is perpendicular to the coordinate paper 63. Using the Y-axis on the coordinate paper 63 as a reference line, the axial positions of the angle system 1 and the adjustable lamp holder 2 on the photometric guide rail 7 are adjusted so that the filament plane of the standard lamp 5 under test is parallel to the test plane of the detector 4 and perpendicular to the measurement axis of the photometric guide rail 7.

[0070] When adjusting using the level instrument 61, the eyepiece and objective lens are adjusted while observing with the level instrument 61 to ensure a clear image of the target surface. The height of the standard lamp 5 and detector 4 under test is adjusted using the rotation system 1 and the adjustable lamp holder 2 so that their geometric centers coincide with the origin of the level instrument 61. Their center points are located on the measurement axis, and the vertical and horizontal rotation axes of the filament plane are both perpendicular to the measurement axis.

[0071] After the detector 4 has warmed up, it is rotated ±1.5° in the horizontal direction through the rotation system 1 to start measuring and recording the results; first measure the horizontal direction, then return to the origin horizontally, and then rotate in the vertical direction to record the reading of the detector 4.

[0072] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An apparatus for measuring the angular characteristics of a standard lamp of luminous intensity, characterized in that, include: Photometric guide rail; An adjustable lamp holder, wherein the fixed end of the adjustable lamp holder is mounted on the photometric guide rail, and the movable end of the adjustable lamp holder is used to mount the standard lamp to be tested; An angle-rotating system, wherein the fixed end of the angle-rotating system is mounted on the photometric guide rail, and the movable end of the angle-rotating system is used to mount the detector, and the angle-rotating system can adjust the horizontal and vertical deflection angles of the detector; And an aperture, which is mounted on the light metering guide rail and located between the adjustable lamp holder and the cornering system.

2. The luminous intensity standard lamp angularity measuring device of claim 1, wherein: The test plane of the detector is parallel to the filament plane of the standard lamp under test and perpendicular to the measurement axis of the photometric guide. The center point of the test plane and the filament plane is located on the measurement axis. The vertical rotation axis and the horizontal rotation axis of the filament plane are both perpendicular to the measurement axis.

3. The luminous intensity standard lamp angularity measuring apparatus according to claim 2, characterized in that: The cornering system includes a base, a lifting structure, and a displacement assembly. The base is mounted on the photometric guide rail. The fixed end of the lifting structure is connected to the base. The displacement assembly includes a horizontal displacement stage, a rotary displacement stage, and a pitch displacement stage. The movable end of the lifting structure is connected to the fixed end of the horizontal displacement stage. The movable end of the horizontal displacement stage is connected to the fixed end of the rotary displacement stage. The movable end of the rotary displacement stage is connected to the fixed end of the pitch displacement stage. The movable end of the pitch displacement stage is connected to a clamp for mounting the detector.

4. The luminous intensity standard lamp angularity measuring apparatus according to claim 3, characterized by: The horizontal displacement stage includes a first fixed part, a first movable part, and a first driving assembly. The first fixed part is disposed at the movable end of the lifting structure, and the first movable part is movably disposed on the first fixed part. The first driving assembly includes a first abutting part and a first pushing structure. The first abutting part is connected to the first movable part, and the first pushing structure is connected to the first fixed part. The first pushing structure is used to push the first abutting part to move.

5. The luminous intensity standard lamp angularity measuring apparatus according to claim 4, characterized in that: The rotary displacement stage includes a second fixed part, a second movable part, and a second driving assembly. The second fixed part is disposed on the first movable part and is rotatably connected to the second fixed part. The second driving assembly includes a second abutting part and a second pushing structure. The second abutting part is connected to the second movable part. Two second pushing structures are provided, and the two second pushing structures are respectively disposed on both sides of the second abutting part. The second pushing structure is used to push the second abutting part to rotate horizontally.

6. The luminous intensity standard lamp angularity measuring apparatus according to claim 5, characterized in that: The pitch displacement stage includes a third fixed part, a third movable part, and a third drive assembly. The third fixed part is disposed on the second movable part and is rotatably connected to the third fixed part. The third drive assembly includes a third abutting part and a third pushing structure. The third abutting part is connected to the third movable part, and the third pushing structure is connected to the third fixed part. The third pushing structure is used to push the third abutting part to pitch and rotate.

7. The luminous intensity standard lamp angularity measuring apparatus according to claim 6, characterized in that: The fixture includes a clamping frame and a set screw. The clamping frame is connected to the third movable part. The interior of the clamping frame is provided with a V-shaped placement groove for placing the detector. The set screw is threaded to the top of the clamping frame, passes through the clamping frame, and abuts against the detector.

8. The luminous intensity standard lamp angularity measuring apparatus according to claim 2, characterized by: At least two apertures are provided, and the two or more apertures are arranged in sequence. The aperture of the aperture gradually decreases from the standard lamp being tested towards the detector until it matches the probe of the detector.

9. The luminous intensity standard lamp angularity measuring apparatus according to claim 2, characterized by: It also includes an adjustment system, which includes a collimating light source, coordinate paper, and a level. The collimating light source emits parallel light rays that are projected onto the coordinate paper to form a reference line. By moving and adjusting the standard lamp under test and the detector, the projections of the test plane of the detector and the filament plane of the standard lamp under test onto the coordinate paper are made parallel to the reference line, respectively.

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