CN101008769A - Projector with cleanable protective cover for camera lens - Google Patents
Projector with cleanable protective cover for camera lens Download PDFInfo
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- CN101008769A CN101008769A CN 200610023597 CN200610023597A CN101008769A CN 101008769 A CN101008769 A CN 101008769A CN 200610023597 CN200610023597 CN 200610023597 CN 200610023597 A CN200610023597 A CN 200610023597A CN 101008769 A CN101008769 A CN 101008769A
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- Prior art keywords
- camera lens
- protective cover
- projector
- cleanable protective
- cleanable
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Abstract
This invention provides one projection machine with clear lens head protection cover, which comprises shell, light engine inside shell, circuit board, light source, and relative dissipation structure, wherein, the light engine projection lens stretches out of shell; the projection lens head is covered with flexible loading protection cover. This invention adopts clear lens protection cover kept on the lens head in work.
Description
Technical field
The present invention relates to a kind of projector, relate in particular to a kind of projector with cleanable protective cover for camera lens.
Background technology
Projector is widely used in education, commerce and the family.Common projector generally comprises a housing and is arranged on the interior photo engine of housing, circuit board, light source and corresponding cooling mechanism.According to what of camera lens used in the photo engine, projector can be divided into single-lens projector and tri-lens projector again.Generally all be earlier the white light that light source produced to be isolated red, green, blue three coloured light in design, by three liquid crystal light valves three coloured light are modulated respectively, three coloured light after the modulation are handled with diverse ways according to different mining single-lens or the three-lens design.In single-lens projector, be with closing that color component is synthesized and by the single lens projection imaging with three coloured light.In tri-lens projector, be that three coloured light are projected to imaging on the same screen via three different camera lenses respectively.Wherein single-lens projector has the advantages that volume is little, be convenient for carrying, but its back focal length is longer, and the bore of camera lens requires bigger, and optical modules such as employed camera lens and spectroscope are very high to the requirement of quality, precision, cause cost higher.And tri-lens projector can project big picture in than short distance, and picture brightness and contrast all improve a lot than single-lens projector.
Particularly in the course of the work, the dust of camera lens surface in can absorbed air influences drop shadow effect in the air that the projecting lens of projector exposes.Therefore the projector of prior art is typically equipped with an over cap; so that cover on camera lens when not working in projector; reduce the pollution of dust in air as far as possible to it; but this over cap generally is opaque; when projector works; it must be taken off the dust in the absorbed air of therefore still unavoidable camera lens surface.Camera lens must clean after work a period of time, to guarantee drop shadow effect.Generally clean in the real work with the glass surface of absolute ethyl alcohol to camera lens, though but the absolute ethyl alcohol volatilization is fast, its speed that absorbs moisture is also very fast, therefore camera lens is after cleaning with absolute ethyl alcohol, it is water stain to tend to form one deck on the camera lens surface, influence transmittance, its influence degree can reach 10%.
Summary of the invention
Purpose of the present invention provides a kind of projector with cleanable protective cover for camera lens exactly in order to address the above problem.
The object of the present invention is achieved like this: a kind of projector with cleanable protective cover for camera lens; comprise housing and be arranged on the interior photo engine of housing, circuit board, light source and corresponding cooling mechanism; projection lens in the photo engine stretches out the side at housing; the over cap that can load and unload is flexibly arranged at the projection lens upper cover; be characterized in; described over cap is a cleanable protective cover for camera lens, and described cleanable protective cover for camera lens is the light penetrating object of two-sided plating anti-reflection film.
Described light penetrating object is made by CR39, PC or similar light transmissive material.
Described cleanable protective cover for camera lens is the part of projection lens, and its optical characteristics designs definite with projection lens.
Described optical characteristics comprises radius-of-curvature, thickness and the refractive index of front-back.
The thickness of described cleanable protective cover for camera lens can uniform thickness from the center to the edge or uniform thickness not.
Described cleanable protective cover for camera lens is garden, center symmetry or dissymmetrical structure, preferred symmetrical structure.
Described cleanable protective cover for camera lens can be bright to the edge full impregnated from the center, and also can core transparent, peripheral part be opaque, can eliminate parasitic light like this.
The projector of band cleanable protective cover for camera lens of the present invention is owing to adopted cleanable protective cover for camera lens; this cleanable protective cover for camera lens is retained on the camera lens in the time of can working in projector; len can be not contaminated; when cleanable protective cover for camera lens is contaminated; can take off water at any time again and clean, to be cleanedly cover on the camera lens again after clean, thereby can make projection lens remain clean and good transmittance; guarantee the drop shadow effect of projector, prolonged the serviceable life of projection lens.
Description of drawings
Fig. 1 is the structural representation of the projector of band cleanable protective cover for camera lens of the present invention.
Embodiment
Referring to Fig. 1; the projector of band cleanable protective cover for camera lens of the present invention; comprise housing 1 and the photo engine, circuit board, light source and the corresponding cooling mechanism that are arranged in the housing 1, the projection lens 2 in the photo engine stretches out the side at housing, at the projection lens upper cover cleanable protective cover for camera lens 3 is arranged.This cleanable protective cover for camera lens is the light penetrating object of two-sided plating anti-reflection film, and light penetrating object is made by CR39, PC or similar light transmissive material.
Cleanable protective cover for camera lens in the projector of band cleanable protective cover for camera lens of the present invention is the part of projection lens on optical characteristics; finish projection with projection lens to image; when making, its optical characteristics (radius-of-curvature, thickness and the refractive index etc. that comprise front-back) designs definite with projection lens.
The thickness of the cleanable protective cover for camera lens in the projector of band cleanable protective cover for camera lens of the present invention can be made from the center edge uniform thickness or uniform thickness not.Also can make garden, center symmetry or dissymmetrical structure, preferably make symmetrical structure.Can also make brightly to the edge full impregnated from the center, or have only core transparent, peripheral part is opaque, helps eliminating parasitic light like this.
The projector of band cleanable protective cover for camera lens of the present invention can be under the situation of not taking off cleanable protective cover for camera lens operate as normal, thereby can protect projection lens to avoid the pollution of dust in air.After cleanable protective cover for camera lens is polluted by dust in air; can take off water at any time and clean, cover on projection lens again after cleaning up, but projector's operate as normal again; thereby prolonged the result of use and the serviceable life of projector lens greatly, have tangible practical value.
Claims (7)
1. projector with cleanable protective cover for camera lens; comprise housing and be arranged on the interior photo engine of housing, circuit board, some lamp source and corresponding cooling mechanism; projection lens in the photo engine stretches out the side at housing; the over cap that can load and unload is flexibly arranged at the projection lens upper cover; it is characterized in that: described over cap is a cleanable protective cover for camera lens, and described cleanable protective cover for camera lens is the light penetrating object of two-sided plating anti-reflection film.
2. the projector of band cleanable protective cover for camera lens as claimed in claim 1 is characterized in that: described light penetrating object is made by CR39, PC or similar light transmissive material.
3. the projector of band cleanable protective cover for camera lens as claimed in claim 1 is characterized in that: described cleanable protective cover for camera lens is the part of projection lens, and its optical characteristics designs definite with projection lens.
4. the projector of band cleanable protective cover for camera lens as claimed in claim 3 is characterized in that: described optical characteristics comprises radius-of-curvature, thickness and the refractive index of front-back.
5. the projector of band cleanable protective cover for camera lens as claimed in claim 1 is characterized in that: the thickness of described cleanable protective cover for camera lens, and can uniform thickness from the center to the edge or uniform thickness not.
6. the projector of band cleanable protective cover for camera lens as claimed in claim 1 is characterized in that: described cleanable protective cover for camera lens is garden, center symmetry or dissymmetrical structure, preferred symmetrical structure.
7. the projector of band cleanable protective cover for camera lens as claimed in claim 1 is characterized in that: described cleanable protective cover for camera lens can be bright to the edge full impregnated from the center, and also can core transparent, peripheral part be opaque, can eliminate parasitic light like this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023597 CN101008769A (en) | 2006-01-24 | 2006-01-24 | Projector with cleanable protective cover for camera lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610023597 CN101008769A (en) | 2006-01-24 | 2006-01-24 | Projector with cleanable protective cover for camera lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101008769A true CN101008769A (en) | 2007-08-01 |
Family
ID=38697259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610023597 Pending CN101008769A (en) | 2006-01-24 | 2006-01-24 | Projector with cleanable protective cover for camera lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101008769A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207505A (en) * | 2013-03-26 | 2013-07-17 | 苏州佳世达光电有限公司 | Projector |
| CN113721411A (en) * | 2020-05-26 | 2021-11-30 | 苏州佳世达光电有限公司 | Liquid crystal projector |
-
2006
- 2006-01-24 CN CN 200610023597 patent/CN101008769A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103207505A (en) * | 2013-03-26 | 2013-07-17 | 苏州佳世达光电有限公司 | Projector |
| CN113721411A (en) * | 2020-05-26 | 2021-11-30 | 苏州佳世达光电有限公司 | Liquid crystal projector |
| CN113721411B (en) * | 2020-05-26 | 2023-08-18 | 苏州佳世达光电有限公司 | Liquid crystal projector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |