CN219977739U - Focal length measuring device - Google Patents
Focal length measuring device Download PDFInfo
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- CN219977739U CN219977739U CN202321409972.7U CN202321409972U CN219977739U CN 219977739 U CN219977739 U CN 219977739U CN 202321409972 U CN202321409972 U CN 202321409972U CN 219977739 U CN219977739 U CN 219977739U
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- convex lens
- focal length
- plate
- lens body
- mounting plate
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- 238000003384 imaging method Methods 0.000 claims abstract description 17
- 238000005259 measurement Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005499 meniscus Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses a focal length measuring device, belongs to the technical field of convex lens focal length measurement, and aims to solve the problems that the error of a convex lens focal length result measured by human eyes is large, and centering clamping of convex lenses with different sizes is inconvenient. Through laser emitter, the screw rod, the hand wheel, arc splint, guide structure, first scale mark, the reflecting plate, the setting of imaging plate, laser rangefinder sensor and display screen, when measuring convex lens body focus, utilize hand wheel and screw rod can make the arc splint carry out stable centre gripping to the convex lens body of equidimension not, utilize guide structure and first scale mark can make the convex lens body be located the intermediate position between two fixed plates, make laser emitter's light spot show clearly through removing the imaging plate, laser rangefinder sensor and reflecting plate measure convex lens body focus this moment, the convex lens body focus result of measurement shows on the display screen, the focus result of measurement is more accurate.
Description
Technical Field
The utility model relates to the technical field of convex lens focal length measurement, in particular to a focal length measuring device.
Background
The convex lens is made according to the refraction principle of light. The convex lens is a lens with thicker center and thinner edge. Convex lenses are classified into biconvex, plano-convex, concave-convex (or positive meniscus) and the like, and convex lenses have the effect of converging light rays, so that the convex lenses are also called converging lenses, and thicker convex lenses have the effects of telescope, converging and the like, which are related to the thickness of the lenses.
At present, when the focal length of the convex lens is measured, the focal length of the convex lens is measured in a manual measurement mode after the eye is observed and imaged clearly, the measured focal length has larger error, and the convex lens with different sizes is inconvenient to center and clamp.
Disclosure of Invention
In view of the problems existing in the prior art, the utility model discloses a focal length measuring device, which adopts the technical scheme that the focal length measuring device comprises a fixed base, two mounting seats are detachably connected to two sides of the upper surface of the fixed base, the mounting seats are used for fixing guide rods, guide rods are arranged between the mounting seats, three movable seats are slidably connected to the guide rods, the movable seats can stably slide on the guide rods through the arrangement of the movable seats and the guide rods, a first mounting plate is detachably connected to the movable seat on the left side, three laser transmitters are connected to the first mounting plate through the first fixing rod, the first mounting plate and the second fixing rod can support the laser transmitters through the first mounting plate, the first fixing rod and the laser transmitters, the three laser transmitters can emit three parallel rays to a convex lens body, the middle is detachably connected with a second mounting plate on the movable seat, the upper surface of the second mounting plate is fixedly connected with two fixing plates, the two fixing plates can be used for mounting a screw rod and a guide structure through the arrangement of the second mounting plate and the fixing plates, the two fixing plates are internally and uniformly connected with the screw rod in a threaded manner, one end of the screw rod is fixedly connected with a hand wheel, the other end of the screw rod is movably connected with an arc clamping plate, the hand wheel and the arc clamping plate can be utilized to rotate the adjusting screw rod through the arrangement of the screw rod, the hand wheel and the arc clamping plate, so that the arc clamping plate can stably clamp the convex lens body, and simultaneously clamp the convex lens bodies with different sizes, the convex lens body is arranged between the arc clamping plates, the guide structure is arranged between the arc clamping plate and the fixing plates, the arc clamping plate can keep stable movement through the arrangement of the guide structure, and the guide structure is provided with a first scale line, through the setting of first scale mark, can make things convenient for accurate regulation arc splint, make the convex lens body be located the intermediate position between two fixed plates, the upper surface of second mounting panel is located two fixedly connected with reflecting plate between the fixed plate, the right side can dismantle on the movable seat and be connected with the third mounting panel, through the setting of third mounting panel, can with the stable imaging plate that supports of second dead lever cooperation, through the setting of second dead lever fixedly connected with imaging plate on the third mounting panel, through the setting of imaging plate, can pass the light demonstration of convex lens body on imaging plate for three times to conveniently measure the focal length, be provided with laser range sensor on the second dead lever, through setting of reflecting plate and laser range sensor, can utilize laser range sensor to transmit laser to the reflecting plate, reflecting plate and reflection laser, thereby realize the accurate measurement to convex lens body focus, the front of imaging plate is provided with the display screen, can show the data that range sensor measures in real time through the setting of display screen, the front of unable setting of fixed base is provided with the second scale mark through the setting up of second scale mark, can conveniently observe the scale mark.
According to the utility model, as a preferable technical scheme, the front and the back of the mounting seat are fixedly connected with the connecting sheet, the connecting sheet is connected with the fixed base through the first bolt, and the mounting seat can be conveniently mounted and dismounted through the arrangement of the connecting sheet and the first bolt.
As a preferable technical scheme of the utility model, threaded holes are formed in the three movable seats, second bolts are arranged on the first mounting plate, the second mounting plate and the third mounting plate, the second bolts are in threaded connection with the threaded holes, and the first mounting plate, the second mounting plate and the third mounting plate can be conveniently mounted and dismounted through the arrangement of the threaded holes and the second bolts.
As a preferable technical scheme of the utility model, the guide structure comprises an upper slide bar, a lower slide bar and a stop block, wherein the upper slide bar is fixedly connected to the arc-shaped clamping plate above the screw rod, the lower slide bar is fixedly connected to the arc-shaped clamping plate below the screw rod, the stop block is fixedly connected to one ends of the upper slide bar and the lower slide bar, which are far away from the arc-shaped clamping plate, and the first scale mark is positioned on the upper slide bar, so that the movement of the arc-shaped clamping plate can be guided and limited through the arrangement of the upper slide bar, the lower slide bar and the stop block, and the arc-shaped clamping plate can be kept to stably move.
As a preferable technical scheme of the utility model, a limit groove is formed in one side, opposite to the arc-shaped clamping plate, of the arc-shaped clamping plate, a protection pad is arranged on the inner wall of the limit groove, the convex lens body is positioned on the inner side of the limit groove, and the limit groove can prevent the convex lens body from being separated from the arc-shaped clamping plate, protect the protection pad and prevent the convex lens body from being damaged by clamping through the arrangement of the limit groove and the protection pad.
The utility model has the beneficial effects that: according to the utility model, through the arrangement of the laser emitter, the screw rod, the hand wheel, the arc clamping plate, the guide structure, the first scale mark, the reflecting plate, the imaging plate, the laser ranging sensor and the display screen, when the focal length of the convex lens body is measured, the hand wheel can be used for rotating the adjusting screw rod, so that the arc clamping plate can stably clamp the convex lens body, simultaneously, the convex lens bodies with different sizes can be clamped, the guide structure and the first scale mark can be used for accurately moving and adjusting the arc clamping plate, the convex lens body can be positioned at the middle position between the two fixing plates, three laser emitters can emit three parallel rays to the convex lens body, the rays are displayed on the imaging plate after passing through the convex lens body, the light points are clearly displayed through the moving imaging plate, and at the moment, the laser ranging sensor emits laser to the reflecting plate and reflects the laser, so that the focal length of the convex lens body is accurately measured, the focal length result of the obtained convex lens body is measured and displayed on the display screen, and the measured focal length result is more accurate.
Drawings
FIG. 1 is a schematic diagram of a front view structure of the present utility model;
FIG. 2 is a schematic side view of a second mounting plate of the present utility model;
fig. 3 is a schematic view of a part of a three-dimensional structure of the present utility model.
In the figure: 1. a fixed base; 2. a mounting base; 3. a guide rod; 4. a movable seat; 5. a first mounting plate; 6. a first fixing rod; 7. a laser emitter; 8. a second mounting plate; 9. a fixing plate; 10. a screw; 11. a hand wheel; 12. an arc clamping plate; 13. a limit groove; 14. a protective pad; 15. a convex lens body; 16. a guide structure; 1601. an upper slide bar; 1602. a lower slide bar; 1603. a stop block; 17. a first scale line; 18. a reflection plate; 19. a third mounting plate; 20. a second fixing rod; 21. an imaging plate; 22. a laser ranging sensor; 23. a display screen; 24. a second graduation mark; 25. a connecting sheet; 26. a first bolt; 27. a threaded hole; 28. and a second bolt.
Detailed Description
Example 1
As shown in fig. 1 to 3, the utility model discloses a focal length measuring device, which adopts the technical scheme that the focal length measuring device comprises a fixed base 1, two mounting seats 2 are respectively arranged on two sides of the upper surface of the fixed base 1 for measuring the focal length of a convex lens body 15, a guide rod 3 is arranged between the mounting seats 2, three movable seats 4 are slidably connected on the guide rod 3, a first mounting plate 5 is detachably connected on the left movable seat 4, the first mounting plate 5 is connected with three laser transmitters 7 through a first fixing rod 6, a second mounting plate 8 is detachably connected on a middle movable seat 4, two fixing plates 9 are fixedly connected on the upper surface of the second mounting plate 8, a convex lens body 15 is arranged between the two fixing plates 9, a third mounting plate 19 is detachably connected on the right movable seat 4, an imaging plate 21 is fixedly connected on the third mounting plate 19 through a second fixing rod 20, in order to facilitate the observation and measurement of focal length by eyes, a second scale mark 24 is arranged on the front surface of the fixed base 1, a reflecting plate 18 is fixedly connected between the fixed plates 9 for further accurate measurement of focal length of the convex lens body 15, a laser ranging sensor 22 is arranged on the second fixed rod 20, a display screen 23 for displaying focal length is arranged on the front surface of the imaging plate 21, in order to stably clamp the convex lens bodies 15 with different sizes and enable the convex lens bodies 15 to be positioned in the middle position between the two fixed plates 9, a screw rod 10 is connected in the two fixed plates 9 in a threaded manner, one end of the screw rod 10 is fixedly connected with a hand wheel 11, the other end of the screw rod 10 is movably connected with an arc clamping plate 12, a limit groove 13 is formed in one side opposite to the arc clamping plate 12, a protection pad 14 is arranged on the inner wall of the limit groove 13, the convex lens body 15 is positioned in the inner side of the limit groove 13, the arc clamping plate 12 is fixedly connected with an upper sliding rod 1601 above the screw rod 10, the arc clamping plate 12 is fixedly connected with a lower sliding rod 1602 below the screw rod 10, one ends of the upper sliding rod 1601 and the lower sliding rod 1602, which are far away from the arc clamping plate 12, are fixedly connected with a stop 1603, a first scale line 17 is arranged on the upper sliding rod 1601, the mounting seat 2 is conveniently detached, connecting pieces 25 are fixedly connected to the front surface and the back surface of the mounting seat 2, the connecting pieces 25 are connected with the fixing base 1 through first bolts 26, the first mounting plate 5, the second mounting plate 8 and the third mounting plate 19 are conveniently detached, threaded holes 27 are formed in the three moving seats 4, second bolts 28 are respectively arranged on the first mounting plate 5, the second mounting plate 8 and the third mounting plate 19, and the second bolts 28 are in threaded connection with the threaded holes 27.
The working principle of the utility model is as follows: when the device is used for measuring the focal length of the convex lens body 15, firstly, the convex lens body 15 is placed in the limiting groove 13 between the arc clamping plates 12, the protection pad 14 plays a role in protection, then, the hand wheel 11 is used for rotating the adjusting screw rod 10, the arc clamping plates 12 stably move through the upper sliding rod 1601 and the lower sliding rod 1602, so that the arc clamping plates 12 stably clamp the convex lens body 15, then, the position of the convex lens body 15 is finely adjusted by utilizing the first scale line 17 and the screw rod 10, the convex lens body 15 is located at the middle position between the two fixing plates 9, then, the three laser transmitters 7 are started, three parallel rays are emitted to the convex lens body by the three laser transmitters 7, the rays penetrate through the convex lens body 15 and are displayed on the imaging plate 21, then, the imaging plate 21 is moved through the moving seat 4 and the guide rod 3, the light points are clearly displayed, at the moment, the laser ranging sensor 22 and the reflecting plate 18 accurately measure the focal length of the convex lens body 15, the measurement result is displayed on the display screen 23, and the focal length can be preliminarily measured by observing the second scale line 24 through eyes.
The mechanical connection according to the utility model is a customary practice adopted by the person skilled in the art, and the technical teaching can be obtained by a limited number of tests, which belongs to the common general knowledge.
The components not described in detail herein are prior art.
Although the specific embodiments of the present utility model have been described in detail, the present utility model is not limited to the above embodiments, and various changes and modifications without inventive labor may be made within the scope of the present utility model without departing from the spirit of the present utility model, which is within the scope of the present utility model.
Claims (5)
1. A focal length measuring device comprising a fixed base (1), characterized in that: two mounting seats (2) are detachably connected to two sides of the upper surface of the fixed base (1), guide rods (3) are arranged between the mounting seats (2), three movable seats (4) are slidably connected to the guide rods (3), a first mounting plate (5) is detachably connected to the movable seats (4) on the left side, three laser transmitters (7) are connected to the first mounting plate (5) through a first fixing rod (6), a second mounting plate (8) is detachably connected to the movable seats (4) in the middle, two fixing plates (9) are fixedly connected to the upper surface of the second mounting plate (8), screws (10) are connected to the two fixing plates (9) in an internal thread mode, one end of each screw (10) is fixedly connected with a hand wheel (11), an arc clamping plate (12) is movably connected to the other end of each screw (10), a convex lens body (15) is arranged between the arc clamping plates (12), a guide structure (16) is arranged between each arc clamping plate (12) and each fixing plate (9), two fixing plates (16) are connected to the two fixing plates (17), the right side can dismantle on moving seat (4) and be connected with third mounting panel (19), be connected with imaging plate (21) through second dead lever (20) fixedly on third mounting panel (19), be provided with laser rangefinder sensor (22) on second dead lever (20), imaging plate (21) openly is provided with display screen (23), unable adjustment base (1) openly is provided with second scale mark (24).
2. A focal length measuring device as claimed in claim 1, wherein: the front and the back of the mounting seat (2) are fixedly connected with connecting sheets (25), and the connecting sheets (25) are connected with the fixed base (1) through first bolts (26).
3. A focal length measuring device as claimed in claim 1, wherein: screw holes (27) are formed in the three movable seats (4), second bolts (28) are arranged on the first mounting plate (5), the second mounting plate (8) and the third mounting plate (19), and the second bolts (28) are in threaded connection with the screw holes (27).
4. A focal length measuring device as claimed in claim 1, wherein: guide structure (16) are including last slide bar (1601), lower slide bar (1602) and dog (1603), be located top fixedly connected with of screw rod (10) on arc splint (12) and go up slide bar (1601), be located below fixedly connected with lower slide bar (1602) of screw rod (10) on arc splint (12), go up slide bar (1601) and lower slide bar (1602) and keep away from one end fixedly connected with dog (1603) of arc splint (12), first scale mark (17) are located on slide bar (1601).
5. A focal length measuring device as claimed in claim 1, wherein: limiting grooves (13) are formed in one side, opposite to the arc-shaped clamping plates (12), of the limiting grooves (13), protection pads (14) are arranged on the inner walls of the limiting grooves (13), and the convex lens body (15) is located on the inner sides of the limiting grooves (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321409972.7U CN219977739U (en) | 2023-06-05 | 2023-06-05 | Focal length measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321409972.7U CN219977739U (en) | 2023-06-05 | 2023-06-05 | Focal length measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219977739U true CN219977739U (en) | 2023-11-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321409972.7U Active CN219977739U (en) | 2023-06-05 | 2023-06-05 | Focal length measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219977739U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607836A (en) * | 2023-12-05 | 2024-02-27 | 钛玛科（北京）工业科技有限公司 | Bracket capable of adjusting measurement distance and application method thereof |
-
2023
- 2023-06-05 CN CN202321409972.7U patent/CN219977739U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117607836A (en) * | 2023-12-05 | 2024-02-27 | 钛玛科（北京）工业科技有限公司 | Bracket capable of adjusting measurement distance and application method thereof |
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