Unlock instant, AI-driven research and patent intelligence for your innovation.

Projection apparatus with filter

A technology of a projection device and a filter device, which is applied in the direction of using the image reproducer of the projection device, the lighting device, the projection device, etc., can solve the problems of increasing the risk of back reflection and the like

Inactive Publication Date: 2009-08-26
OSRAM GMBH
View PDF1 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A small deflection angle of the glass generally has the disadvantage that there is an increased risk of reflections back towards the lamp

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Projection apparatus with filter
  • Projection apparatus with filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] now refer to figure 1 The projection device according to the present invention will be described with a first embodiment shown in .

[0017] The projection device 1 has an image display system 2, an optical system 4 and a light source 6 with a reflector 8, which will pass through the light source 6 from the optical system 4 (i.e. figure 1 The light radiation emitted from the center to the left) is focused and directed toward the optical system 4 (that is, in figure 1 Center to right) deflection. The reflector 8 essentially has an elliptical shape, so that the focal radiation of the light source 6 is focused onto a secondary focal point.

[0018] figure 1 The light source 6 in is a high pressure discharge lamp. The front plate 16 arranged between the reflector 8 and the optical system 4 serves here as explosion protection if the high-pressure discharge lamp should burst. However, any desired lamps having the desired properties for the projection device 1 can also be...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a projection apparatus with a light source 6, an optical system 4 and at least one filter device 10, 12 for transmitting a first portion of the radiation from the light source in a first wavelength range in the visible range to the optical system and for reflecting a second portion of the radiation in a second wavelength range outside the visible range.

Description

technical field [0001] The invention relates to a projection device with a filter, in particular for light radiation outside the visible range. Background technique [0002] As described in WO 07 / 024120 A1, in an image projection system with a discharge lamp according to the prior art, a discharge lamp with an elliptical reflector is provided and the radiation is passed through a UV filter / IR filter (ie UV filter or IR filter or UV-IR filter) to the image display system. UV filters / IR filters are usually built flat. Ultra-high pressure discharge lamps are used as discharge lamps. As a result of the reflection of the radiation from the filter back into the lamp, where a part of the light beam is focused towards the lamp, high temperatures are generated on parts of the lamp, which significantly shortens the service life of the lamp and can even cause the lamp to burst due to the high temperature. [0003] Furthermore, in the prior art flat glasses with a dichroic coating ar...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04N9/31H04N5/74G03B21/20F21V9/04F21V9/06
CPCH04N9/3197G03B21/208G03B21/20H04N9/315
Inventor 亨宁·雷恩米夏埃尔·维尔阿克
Owner OSRAM GMBH