CN88204404U - Changeable lens shade - Google Patents
Changeable lens shade Download PDFInfo
- Publication number
- CN88204404U CN88204404U CN 88204404 CN88204404U CN88204404U CN 88204404 U CN88204404 U CN 88204404U CN 88204404 CN88204404 CN 88204404 CN 88204404 U CN88204404 U CN 88204404U CN 88204404 U CN88204404 U CN 88204404U
- Authority
- CN
- China
- Prior art keywords
- light shield
- shade
- lens
- urceolus
- stretching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The utility model discloses a changeable lens shade used for the medium and long fixed-focus lenses or long changed-focus lenses of the 135, 120 single lens reflecting cameras, composed of a stretching lens shade, a lens shading ring and a lens shading diaphragm. The length of the stretching lens shade is regulated, the front end of the stretching lens shade is provided with the lens shading ring or the lens shading diaphragm. The changeable lens shade can steplessly change a lens shading angle so as to achieve the purpose of shielding for the medium and long focus lenses.
Description
The utility model is variable light shield, belongs to camera accessories, is applicable to that various mid-focal lengths, the long-focus of 135 and 120 single lens reflex cameras focuses apart from the camera lens shading, also be applicable to various in, long zoom lens's shading.
Existing light shield has only standard lens and wide-angle lens light shield, and its architectural feature is that length is fixed, and changes lamp shielding angle with the method that changes tube length.This structure exists a problem, and no matter you use mid-focal length or long focal length lens, can only use the light shield of standard lens.For example: 200 millimeters camera lenses of one 135 camera, and 200 millimeters lens hoods of adapted, need only light source like this beyond 13 ° of visual angles, we just can normal photographing.And we can only use the standard lens light shield now.Light source must could be taken in addition at 47 ° of visual angles like this.Otherwise light will influence image quality by the direct projection camera lens, and in view of this existing light shield uses the selection of optic angle degree, shooting angle to be restricted in adapted, during long focal length lens, in making, the telephoto lens function can not make full use of.Existing light shield is to change lamp shielding angle with changing light shield length, and is various fixed length light shields.If make the long focal length lens light shield in this way, its length is very long, thereby impracticable.For 80～200 millimeters zoom lens, will join a plurality of light shields, this is beyond affordability concerning the user.
The utility model purpose solves above-mentioned a series of problem exactly, designs a kind of light shield applied widely.
The design concept of variable light shield is as follows:
Its main body is made up of an inner core and urceolus, and two Spring Cards are arranged on the urceolus, and two guide grooves are arranged on the inner core, presses Spring Card, and urceolus just can move forward and backward, and light shield length is changed, and decontrols Spring Card, and urceolus is the location just, so that use.
The utility model has also changed merely to change the design philosophy that length changes lamp shielding angle.Be furnished with shade in outer cylinder front end, reach the purpose that changes lamp shielding angle to change light shield front end pore size.
The structure of variable light shield:
1, stretching light shield (see figure 1):
It is the main body of variable light shield, is made up of urceolus (1), inner core (2), briquetting (3), guide block (4), spring leaf (5), screw (6).Inner/outer tube is tubular structure, has two guide grooves on the inner tube wall, and the rear end has screw thread and camera lens to join.The Spring Card that the urceolus middle part is made up of guide block, spring leaf, briquetting, screw, front end has screw thread and shade or shading aperture to join, and is clearance fit between the inner/outer tube.
2, shade
Shade is by shade A(7) (see figure 2), shade B(8) the (see figure 3) composition.Shade A can be contained in stretching light shield front end, and shade B can be contained on the shade A.
3, shading aperture (seeing Fig. 4, Fig. 5)
The structure of shading aperture is similar to the iris diaphragm structure on the camera.It is made up of shrouding disc (9), pulling block (10) driver chuck (11), matte (12), chassis (13), screw (14).There is screw thread can be contained in stretching light shield front end on the chassis.Stir pulling block and just can change stop opening, to change lamp shielding angle.Its shading scope is big, easy to use.
The utility model method of operating and enforcement are described below: the stretching light shield respectively with shade, the shading aperture is used, the user can select as required.
1, the stretching light shield is contained in the zoom lens front end.Press Spring Card and move forward and backward urceolus, adjust light shield length, and from view finder, observe.Make four jiaos the dark space to occur earlier, shorten light shield length then, the dark space is reduced.When the dark space just disappeared, the trip spring card made the urceolus location, at this moment shaded effect the best.
Still do not occur the dark space when the longest if 2 stretching light shields reach, just it is reduced to weakness, load onto shade A, repeat 1 process.If still no dark space occurs, the weakness of also withdrawing refills shade B, repeats 1 process equally.
3, be contained in stretching light shield front end after shading aperture unthreaded hole is reached maximum, adjust light shield length or stir pulling block and change the shading stop opening and make four jiaos the dark space to occur, oppositely adjust light shield length then or oppositely stir pulling block, just disappear up to the dark space.
Existing camera lens is of a great variety.135 camera zoom have 35～70 millimeters, 35～105 millimeters, 70～210 millimeters, 80～200 millimeters, 100～300 millimeters wait the zoom lens and multiple in, long-focus focuses apart from camera lens.120 cameras also have multiple in, long focal length lens.Use the utility model light shield to match with it.For example: designing an internal diameter is 64mm, and contracted length is the stretching light shield of 115mm for the 75mm tensile elongation, and the adapted internal diameter is the shade A of 48mm and the shade B that internal diameter is 36mm, and its shading scope is: zoom lens 80～200mm.The shading aperture of adapted internal diameter 48mm～20mm, its shading scope is: zoom lens 80～300mm.
The utility model is compared with existing light shield, and following advantages is arranged:
In having realized, the shading of long focal length lens light shield. Can be a plurality of focusing apart from the camera lens shading with a light shield, also an available light shield be in, long zoom lens's shading.
The lamp shielding angle of this light shield is adjusted into stepless adjustment. Fig. 6 is the installation diagram overall picture.
Claims (1)
1, a kind ofly be used in 135,120 single lens reflex cameras, long focus apart from camera lens or in, long zoom lens's variable light shield, be to form by stretching light shield, shading aperture and shade, it is characterized in that:
A, stretching light shield are made up of urceolus (1), inner core (2), briquetting (3), guide block (4), spring leaf (5), screw (6), with thread connection on camera lens, it between inner core and urceolus accurate clearance fit, two guide grooves are arranged on the inner core, the Spring Card that the urceolus middle part is made up of guide block, spring leaf, briquetting, pressing the Spring Card urceolus can move back and forth within the specific limits.
B, shade A (7) are the large aperture disk, with being threadedly connected to stretching light shield front end; Shade B (8) is the small-bore disk, with being threadedly connected on the shade (7).
Variation can be contracted, be put in the aperture of C, shading aperture, and it is made up of shrouding disc (9) pulling block (10), driver chuck (11), matte (12), chassis (13), screw (14), is connected in stretching light shield front end with screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204404 CN88204404U (en) | 1988-04-27 | 1988-04-27 | Changeable lens shade |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 88204404 CN88204404U (en) | 1988-04-27 | 1988-04-27 | Changeable lens shade |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN88204404U true CN88204404U (en) | 1988-11-30 |
Family
ID=4839016
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 88204404 Ceased CN88204404U (en) | 1988-04-27 | 1988-04-27 | Changeable lens shade |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN88204404U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107659788A (en) * | 2017-10-12 | 2018-02-02 | 福建冠威智能科技有限公司 | A kind of doorbell of lens wearer with new technology and the process of eyeglass |
| CN107991828A (en) * | 2017-12-27 | 2018-05-04 | 哈尔滨学院 | A kind of miniature aperture rotary adjuster for mobile phone |
| CN110646936A (en) * | 2019-09-17 | 2020-01-03 | 中国科学院光电研究院 | Adjustable diaphragm device suitable for different light beam conditions |
| CN110850662A (en) * | 2019-11-01 | 2020-02-28 | 上海航天控制技术研究所 | Multi-degree-of-freedom optical search system |
| CN113878228A (en) * | 2021-11-11 | 2022-01-04 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
-
1988
- 1988-04-27 CN CN 88204404 patent/CN88204404U/en not_active Ceased
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107659788A (en) * | 2017-10-12 | 2018-02-02 | 福建冠威智能科技有限公司 | A kind of doorbell of lens wearer with new technology and the process of eyeglass |
| CN107991828A (en) * | 2017-12-27 | 2018-05-04 | 哈尔滨学院 | A kind of miniature aperture rotary adjuster for mobile phone |
| CN107991828B (en) * | 2017-12-27 | 2023-10-20 | 哈尔滨学院 | Miniature aperture rotary regulator for mobile phone |
| CN110646936A (en) * | 2019-09-17 | 2020-01-03 | 中国科学院光电研究院 | Adjustable diaphragm device suitable for different light beam conditions |
| CN110850662A (en) * | 2019-11-01 | 2020-02-28 | 上海航天控制技术研究所 | Multi-degree-of-freedom optical search system |
| CN113878228A (en) * | 2021-11-11 | 2022-01-04 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
| CN113878228B (en) * | 2021-11-11 | 2022-12-09 | 中国科学院力学研究所 | Controllable focusing device for inner wall laser processing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right |