CN109143724B - Adjustable light ring device - Google Patents
Adjustable light ring device Download PDFInfo
- Publication number
- CN109143724B CN109143724B CN201811322423.XA CN201811322423A CN109143724B CN 109143724 B CN109143724 B CN 109143724B CN 201811322423 A CN201811322423 A CN 201811322423A CN 109143724 B CN109143724 B CN 109143724B
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- Prior art keywords
- ring
- aperture
- lead
- dimming
- wall
- Prior art date
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- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000012528 membrane Substances 0.000 claims description 10
- 230000002035 prolonged effect Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 description 6
- 238000003384 imaging method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 241000282326 Felis catus Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B9/00—Exposure-making shutters; Diaphragms
- G03B9/02—Diaphragms
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Diaphragms For Cameras (AREA)
Abstract
The invention provides an adjustable light ring device which comprises a first ring, a light adjusting ring, a second ring, a plurality of leads, a shading film, a plurality of positioning screws and a plurality of adjusting screws. The light shielding film is a cylindrical light-proof elastic film; the first ring and the second ring are coaxially fixed together, and the two side end surfaces of the shading film are respectively fixed; the dimming ring is coaxially assembled between the first ring and the second ring and can rotate around the axis; one end of each lead is fixed on the first ring by a positioning screw, and the other end bypasses the outer wall of the shading film and is fixed on the dimming ring by an adjusting screw; all the leads are distributed at equal intervals along the circumference of the outer wall of the shading film, and the outer wall of the shading film is restrained to form an approximately circular aperture; the dimming ring rotates relative to the first ring to drive the lead wire and the outer wall of the shading film, so that the aperture is enlarged and reduced. The invention has the advantages that under various apertures, the aperture is approximately circular and can be continuously adjusted in size.
Description
Technical Field
The invention belongs to the field of optics, and particularly relates to an adjustable optical ring device.
Background
In an adjustable optical ring, an apparatus for controlling how much light can be transmitted and then be incident on a photosensitive surface is commonly used in optical devices such as cameras, microscopes, and laser testers. The original adjustable aperture is just a series of round holes with different sizes, which are arranged on a disc with a central shaft, and the aperture is controlled by rotating the disc to select different apertures, so that the apertures are still applied to microscopes and other devices. Thereafter, a cat eye type diaphragm is formed by relatively arranging two sheets with oval or diamond holes at the center, and the size of the diaphragm is changed by relatively moving the two sheets.
The two adjustable diaphragms have the advantages of few parts and simple structure, but the first adjustable diaphragm has only fixed apertures for selection, which is not beneficial to fine adjustment of light throughput; the second type is that although the aperture size can be continuously adjusted, the aperture shape is extremely irregular, and according to the optical diffraction phenomenon, the irregular aperture shape can cause complex patterns with alternate brightness and darkness in imaging on a photosensitive surface, and the imaging accuracy is affected.
The closer the aperture is to a circle, the higher the imaging quality. Thus, an iris diaphragm is presented, which is composed of a plurality of arc-shaped metal blades overlapped with each other, and the size of the central aperture can be changed by controlling the clutch of the blades. The more the number of blades, the more reasonable the arc envelope design of the blades, the closer the aperture of the diaphragm is to circular. However, the iris diaphragm can only realize that the diaphragm aperture formed by the blade covered wire is approximately circular under the diaphragm aperture with a certain characteristic, and has obvious sharp points at other times, so that the imaging accuracy is affected; in addition, the iris diaphragm has a complex structure, even tens of parts, and is expensive to use and maintain.
For example, chinese patent application publication No.: CN 101907814A, publication No. 2010.12.08, discloses a diaphragm device comprising a plurality of diaphragm blades overlapped with each other, wherein the diaphragm device shields the cam grooves of the diaphragm blades of the preceding stage in sequence by the diaphragm blades of the subsequent stage, thereby shielding all the cam grooves entering the optical path opening. However, the device still cannot avoid the defects that the iris diaphragm structure is complex, the diaphragm aperture is not circular and sharp points exist.
Disclosure of Invention
In order to overcome the defect that the prior adjustable aperture or the existing aperture is circular, the aperture can not be continuously adjusted; or the aperture has a sharp point, but the aperture can be continuously adjusted, the invention provides an adjustable aperture device which has a circular aperture at various aperture sizes and can be continuously adjusted.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an adjustable optical ring device, includes first ring, adjusting ring, second ring, many lead wires, shading membrane, many set screws and many adjusting screw, the shading membrane is cylindric, the elastic membrane of light-tight, first ring with the coaxial fixing of second ring is in the same place, and fix respectively the both sides terminal surface of shading membrane, by the cylindric space that first ring, second ring and shading membrane each inner wall confirmed is the aperture that the light column passed through, the coaxial assembly of adjusting ring in between first ring and the second ring, can rotate around the axis, the one end of every lead wire by set screw is fixed on the first ring, the other end is walked around the outer wall of shading membrane to by adjusting screw is fixed on the adjusting ring, the lead wire has many, is in same cross-section internal along the outer wall circumference equidistant distribution of shading membrane, retrains the outer wall of shading membrane constitutes the aperture that the light column passed, promptly, because many the lead wire is retraining the outer wall of shading membrane all the time is the aperture that the light column passed through, the aperture is in the effect that the aperture is in the same place to the annular with the lead wire and the tensioning ring is in the effect that the aperture is in the aperture and is in the annular.
Further, a plurality of positioning screws which are distributed along a circumference at equal intervals and have the same number as the lead wires are fixed on the first ring, one end of the lead wires is fixed one by one, adjusting screws which are distributed along another circumference at equal intervals and have the same number as the positioning screws are arranged on the dimming ring, the other end of the lead wires is fixed one by one, and the circumferences of the positioning screws and the adjusting screws are all outside the outer wall of the shading film.
Further, an adjusting hole corresponding to the position of the adjusting screw is formed in the first ring, the adjusting screw is screwed through the adjusting hole, the effective length of each lead wire can be changed, the effective length of each lead wire is completely equal through the fine screwing of the adjusting screw, the aperture is completely centered with the axis of the first ring, the light is prevented from being emitted on the light sensitive surface, in addition, the effective length of each lead wire is prolonged or shortened in an equivalent manner through the screwing of the adjusting screw, and the rotation ratio of the light adjusting ring and the aperture scaling can be adjusted.
Further, when the effective length of the lead is adjusted under the initial condition, an included angle between the positioning screw corresponding to the lead and the axis of the adjusting screw and the axis of the first ring should be greater than 180 degrees and smaller than 360 degrees, the effective length of the lead should be smaller than the circumferential arc length of the positioning screw corresponding to the included angle and the circumference of the adjusting screw, but greater than the sum of the radius of the circumference of the positioning screw and the radius of the circumference of the adjusting screw, the included angle is about greater, and when the effective length of the lead is longer, the dimming ring rotates by the same angle, the smaller the scaling amount of the aperture is, and the higher the precision of aperture adjustment is.
Further, the contact surfaces of the first ring and the dimming ring are respectively provided with a ripple groove, the ripple grooves of the first ring and the ripple grooves of the dimming ring are mutually clamped together to prevent the dimming ring from rotating manually, and the dimming ring can rotate and position continuously relative to the first ring to continuously enlarge and reduce the aperture.
Furthermore, the outer wall of the shading film is smooth, the lead is a flexible thin wire with a smooth surface and no expansion, and the outer wall of the shading film except the end surfaces at two sides is only in contact with the lead.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) The circle center position of the aperture can be accurately adjusted, so that the light rays are prevented from being emitted on the light sensitive surface to deviate;
(2) The size of the aperture can be continuously adjusted, and meanwhile, the aperture is approximately circular under various apertures, so that the imaging accuracy is ensured; (3) The device has the advantages of fewer parts, simple structure, convenient installation and debugging and reduced production and use cost.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is a schematic view partially in section of the I position in fig. 1.
Fig. 3 is a schematic front view for explaining the interrelation of the set screw, the lead wire, and the light shielding film.
Fig. 4 is a schematic side view for explaining the interrelation of the set screw, the lead wire, and the light shielding film.
Fig. 5 is a schematic diagram for explaining the aperture zoom by pulling the lead wire.
Detailed Description
An embodiment of the present invention will be described below with reference to the drawings.
Fig. 1 is a schematic perspective view of an embodiment of the present invention, fig. 2 is a schematic view partially cut-away and enlarged at the I position of fig. 1, in which a dimming ring and a lead are not shown, fig. 3 is a schematic front view for explaining the interrelation of a set screw, a lead and a light shielding film, in which a first ring is partially cut away, the light shielding film shows only an aperture, fig. 4 is a schematic side view for explaining the interrelation of the set screw, the lead and the light shielding film, and fig. 5 is a schematic view for explaining the zoom of the aperture by pulling the lead.
The adjustable light ring device as shown in fig. 1, 2 and 3 comprises a first ring 1, a light adjusting ring 2, a second ring 3, a plurality of leads 4, a light shielding film 5, a plurality of positioning screws 6 and a plurality of adjusting screws 7, wherein the light shielding film 5 is a cylindrical and light-proof elastic film, the first ring 1 and the second ring 3 are coaxially fixed together and respectively fix the two side end surfaces of the light shielding film 5, the axial rotation of the light shielding film 5 is avoided, the cylindrical space determined by the inner walls of the first ring 1, the second ring 3 and the light shielding film 5 is the aperture through which a light beam passes, the light adjusting ring 2 is coaxially assembled between the first ring 1 and the second ring 3 and can manually rotate around the axis, one end of each lead 4 is fixed on the first ring 1 by the positioning screw 6, the other end bypasses the outer wall of the shading film 5 and is fixed on the dimming ring 2 by the adjusting screw 7, the number of the leads 4 is 3 in the embodiment shown in fig. 3, the leads 4 are equally spaced along the circumference of the outer wall of the shading film 5 in the same section, the outer wall of the shading film 5 is restrained to form an effective aperture through which a light beam passes, namely an aperture 8, and as the 3 leads 4 are always restrained on the outer wall of the shading film 5, the aperture 8 is approximately circular under the action of the elasticity of the shading film 5 and the tension force of the leads 4, the circle center is positioned on the axis of the first ring 1, and the aperture 8 can be enlarged and reduced by rotating the dimming ring 2 to draw the leads 4 and the outer wall of the shading film 5.
The first ring 1 and the second ring 3 as shown in fig. 2 are fixed together by a positioning block 11 and a screw 12, a film pressing ring 13 is arranged on each of the first ring 1 and the second ring 3, and two side end surfaces of the light shielding film 5 are respectively fixed on the first ring 1 and the second ring 3 by fastening screws 14.
The first ring 1 as shown in fig. 3 and fig. 4 is fixed with a plurality of positioning screws 6 which are equally spaced along a circumference and have the same number as the lead wires 4, 3 in the embodiment shown in fig. 3, for fixing one end of the lead wires 4 one by one, the dimming ring 2 is provided with 3 in the embodiment shown in fig. 3, which are equally spaced along another circumference and have the same number as the positioning screws 6, and the circumferences of the positioning screws 6 and the positioning screws 7 are all outside the outer wall of the light shielding film 5.
As shown in fig. 3, the first ring 1 is provided with an adjusting hole 9 corresponding to the position of the adjusting screw 7, the adjusting screw 7 is screwed through the adjusting hole 9, so that the effective length of each lead 4 can be changed, when the effective lengths of the leads 4 are equal, the aperture 8 is completely aligned with the axis of the first ring 1, so that the light is prevented from being emitted on the light sensing surface, and in addition, the effective length of each lead 4 is prolonged or shortened by the screwing of the adjusting screw 7, so that the scaling ratio of the rotation of the dimming ring 2 and the scaling of the aperture 8 can be adjusted.
As shown in fig. 3, when the effective length of the lead wire 4 is adjusted under the initial condition, the included angle between the positioning screw 6 and the adjusting screw 7 corresponding to one lead wire 4 and the axis of the first ring 1 should be greater than 180 degrees and less than 360 degrees, the effective length of the lead wire 4 should be smaller than the circumferential arc length of the positioning screw 6 and the adjusting screw 7 corresponding to the included angle, but greater than the sum of the radii of the circumferences of the positioning screw 6 and the adjusting screw 7, the greater the included angle is, and the longer the effective length of the lead wire 4 is, the smaller the aperture scaling amount of the aperture 8 is and the higher the accuracy of the aperture 8 adjustment is when the adjusting ring 2 rotates by the same angle.
The contact surfaces of the first ring 1 and the dimming ring 2 as shown in fig. 1 and 3 are respectively provided with a ripple groove 10, the ripple groove of the first ring 1 and the ripple groove of the dimming ring 2 are mutually clamped together to prevent the dimming ring 2 from rotating manually, and the dimming ring 2 can rotate and position continuously relative to the first ring 1 to continuously enlarge and reduce the aperture 8.
The outer wall of the shading film 5 is smooth, the lead 4 is a flexible fine wire with smooth surface and no expansion, and the outer wall of the shading film 5 except the end faces at two sides is only contacted with the lead 4.
The embodiments described in this specification are merely examples of implementation forms of the inventive concept, for example, 3 or more leads in the embodiments can still achieve the same function, and the scope of protection of the present invention should not be construed as being limited to the specific forms described in the embodiments, and the scope of protection of the present invention and equivalent technical means that can be thought of by those skilled in the art according to the inventive concept.
Claims (3)
1. The utility model provides an adjustable light circle device, includes first ring (1), dimming ring (2), second ring (3), many lead wires (4), shading membrane (5), many set screw (6) and many adjusting screw (7), its characterized in that: the light shielding film (5) is a cylindrical and light-tight elastic film, the first ring (1) and the second ring (3) are coaxially fixed together, the end faces of the two sides of the light shielding film (5) are respectively fixed, cylindrical spaces defined by the inner walls of the first ring (1), the second ring (3) and the light shielding film (5) are apertures through which light beams pass, the light shielding ring (2) is coaxially assembled between the first ring (1) and the second ring (3) and can rotate around an axis, one end of each lead wire (4) is fixed on the first ring (1) by the positioning screw (6), the other end of each lead wire bypasses the outer wall of the light shielding film (5) and is fixed on the light shielding ring (2) by the adjusting screw (7), the lead wires (4) are distributed at equal intervals along the outer wall of the light shielding film (5) in the same section, the outer wall of the light shielding film (5) is restrained to form an effective aperture through which the light beams pass, namely the aperture (8) is approximately contracted by the circular ring (8), and the circular lead wire (8) is positioned on the circle center of the light shielding ring (8) and the circle (2) can rotate;
a plurality of positioning screws (6) which are distributed at equal intervals along one circumference and have the same number as the leads (4) are fixed on the first ring (1), one end of the leads (4) is fixed one by one, adjusting screws (7) which are distributed at equal intervals along the other circumference and have the same number as the positioning screws (6) are arranged on the dimming ring (2), the other end of the leads (4) is fixed one by one, and the circumferences of the positioning screws (6) and the adjusting screws (7) are all outside the outer wall of the shading film (5);
an adjusting hole (9) corresponding to the position of the adjusting screw (7) is formed in the first ring (1), the adjusting screw (7) is screwed through the adjusting hole (9), the effective length of each lead (4) can be changed, when the effective lengths of the leads (4) are equal, the aperture (8) is completely aligned with the axis of the first ring (1), the effective length of each lead (4) is prolonged or shortened by an equal amount, and the scaling ratio of the rotation of the dimming ring (2) and the aperture (8) can be adjusted;
when the effective length of the lead (4) is adjusted under the initial condition, the included angle between the positioning screw (6) and the adjusting screw (7) corresponding to one lead (4) and the axis of the first ring (1) is larger than 180 degrees and smaller than 360 degrees, and the effective length of the lead (4) is smaller than the circumferential arc length of the positioning screw (6) and the adjusting screw (7) corresponding to the included angle, but is larger than the sum of the radiuses of the circumferences of the positioning screw (6) and the adjusting screw (7).
2. An adjustable collar device as in claim 1 wherein: the contact surfaces of the first ring (1) and the dimming ring (2) are respectively provided with a ripple groove (10), the ripple grooves of the first ring (1) and the ripple grooves of the dimming ring (2) are mutually clamped together to prevent the dimming ring (2) from rotating manually, and meanwhile, the dimming ring (2) can continuously rotate and position relative to the first ring (1) to continuously enlarge and reduce the aperture (8).
3. An adjustable collar device as in claim 1 wherein: the outer wall of the shading film (5) is smooth, the lead (4) is a flexible thin wire with a smooth surface and no expansion, and the outer wall of the shading film (5) except the end faces at two sides is only in contact with the lead (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322423.XA CN109143724B (en) | 2018-11-08 | 2018-11-08 | Adjustable light ring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811322423.XA CN109143724B (en) | 2018-11-08 | 2018-11-08 | Adjustable light ring device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109143724A CN109143724A (en) | 2019-01-04 |
| CN109143724B true CN109143724B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811322423.XA Active CN109143724B (en) | 2018-11-08 | 2018-11-08 | Adjustable light ring device |
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| Country | Link |
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| CN (1) | CN109143724B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110403758B (en) * | 2019-06-25 | 2021-07-16 | 泉州市望海机械科技有限公司 | Wearable intelligent equipment with eyesight improving function |
| CN110518452B (en) * | 2019-07-30 | 2020-10-30 | 谢剑嘉 | Electric pumping deep ultraviolet AlGaN semiconductor laser |
| CN111486966B (en) * | 2020-05-07 | 2022-12-09 | 江苏日颖慧眼智能设备有限公司 | Diaphragm assembly and infrared sensor temperature measuring device |
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|---|---|---|---|---|
| AT288856B (en) * | 1968-02-06 | 1971-01-15 | Pentacon Dresden Veb | INTERCHANGEABLE TAKING LENS, PREFERRED FOR SINGLE-EYE REFLECTIVE CAMERAS, WITH BUILT-IN PRESELECTION APERTURE AND A SECTOR AUXILIARY SECTOR CLOSURE IS NOT OPENED FOR THE REAL EXPOSURE PROCESS |
| US4184454A (en) * | 1977-12-02 | 1980-01-22 | La Dee Nagao | Animal fumigating unit |
| CN101086595A (en) * | 2006-06-09 | 2007-12-12 | 亚洲光学股份有限公司 | Multistage combined type diaphragm shutter device |
| CN101685237A (en) * | 2008-09-25 | 2010-03-31 | 日本精密测器株式会社 | Iris device |
| CN102141573A (en) * | 2010-12-23 | 2011-08-03 | 江西洪都航空工业集团有限责任公司 | Rotational speed image measurement technology of landing gear drop test aircraft wheel |
| WO2013110012A1 (en) * | 2012-01-19 | 2013-07-25 | Gibson Guitar Corp. | Musical instrument transducer cavity |
| CN103809347A (en) * | 2014-02-13 | 2014-05-21 | 格科微电子（上海）有限公司 | Camera aperture and control adjusting method thereof |
| CN208834063U (en) * | 2018-11-08 | 2019-05-07 | 山东理工大学 | A kind of adjustable aperture device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10016925A1 (en) * | 2000-04-05 | 2001-10-11 | Zeiss Carl | Iris diaphragm |
-
2018
- 2018-11-08 CN CN201811322423.XA patent/CN109143724B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT288856B (en) * | 1968-02-06 | 1971-01-15 | Pentacon Dresden Veb | INTERCHANGEABLE TAKING LENS, PREFERRED FOR SINGLE-EYE REFLECTIVE CAMERAS, WITH BUILT-IN PRESELECTION APERTURE AND A SECTOR AUXILIARY SECTOR CLOSURE IS NOT OPENED FOR THE REAL EXPOSURE PROCESS |
| US4184454A (en) * | 1977-12-02 | 1980-01-22 | La Dee Nagao | Animal fumigating unit |
| CN101086595A (en) * | 2006-06-09 | 2007-12-12 | 亚洲光学股份有限公司 | Multistage combined type diaphragm shutter device |
| CN101685237A (en) * | 2008-09-25 | 2010-03-31 | 日本精密测器株式会社 | Iris device |
| CN102141573A (en) * | 2010-12-23 | 2011-08-03 | 江西洪都航空工业集团有限责任公司 | Rotational speed image measurement technology of landing gear drop test aircraft wheel |
| WO2013110012A1 (en) * | 2012-01-19 | 2013-07-25 | Gibson Guitar Corp. | Musical instrument transducer cavity |
| CN103809347A (en) * | 2014-02-13 | 2014-05-21 | 格科微电子（上海）有限公司 | Camera aperture and control adjusting method thereof |
| CN208834063U (en) * | 2018-11-08 | 2019-05-07 | 山东理工大学 | A kind of adjustable aperture device |
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| CN109143724A (en) | 2019-01-04 |
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