CN2062861U

CN2062861U - Projection optical lantern

Info

Publication number: CN2062861U
Application number: CN 89215659
Authority: CN
Inventors: 郭夏华
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-08-21
Filing date: 1989-08-21
Publication date: 1990-09-26

Abstract

The utility model discloses a projection optical lantern, comprising a casing, a reversed phase mirror, a phase collection amplifying lens, a light source and a slide slot, wherein, the light source is put above the slide slot and uses the reflection light for imaging; existing optical lanterns totally use the transmitted light for imaging; because colorful lights are absorbed by patterns of the slide, the imaged image presents colors of black and white; the utility model uses the reflection light for imaging and is able to image colorful images. The utility model not only is suitable for slides but also is capable of using true objects for imaging. The utility model relieves of the trouble of making slides, so the imaged image is the colorful image. The utility model is in particular suitable to be used for teaching, replaces the existing optical lantern and has the wide selling market.

Description

Projection optical lantern

The utility model relates to a kind of overhead projector, and it is to utilize the reflected light imaging.

Existing slide projector is to adopt the transmitted light imaging.As Fig. 3 and Fig. 4, the light transmission lantern slide that light source 4 sends, by condenser, enlarging lens and anti-phase mirror are transmitted to the pattern on the lantern slide on the screen.Such slide projector needs to make lantern slide.And since on the sheet pattern absorbed some in the light coloured light arranged, so launch the pattern that comes white colour darkly.This is that light must come out through lantern slide owing to adopt transmission method

Pattern has absorbed partly coloured light.

The utility model is changed existing slide projector and is utilized the transmitted light imaging, and adopts the reflected light imaging, can not only carry out catoptric imaging to material object like this, and imaging is colored, also removes the trouble of making lantern slide from.

The utility model is finished like this:

It is by casing, and anti-phase mirror gathers the phase amplifying lens, and light source and film trap are formed.Light source places the film trap top.The reflection of the light that light source sends material object or lantern slide in film trap is by the imaging to the screen of poly-phase magnifier and anti-phase mirror.According to the propagation law of light, along rectilinear propagation, the each point scioptics that emit beam become the colour phase alternation standing statue to light on the object in homogeneous medium, again via anti-phase mirror, become upright color images on screen.

The not only available lantern slide imaging of the utility model also can utilize imaging in kind, and imaging is a color images.Change existing slide projector and must make lantern slide, and imaging is the disadvantage of black and white picture.The sample of the utility model trial-production shows that it has advantages such as with low cost, attractive in fashion, practicality, will make huge contribution to audio-visual education programme.

The utility model is described in further detail below in conjunction with embodiment.

Fig. 1 implements illustration for the utility model, and Fig. 2 is its index path; Fig. 3 is existing slide projector structural map, and Fig. 4 is its index path.

Among Fig. 1:

1. casing 2. anti-phase mirrors 3. gather phase magnifier 4. light sources (high-power bulb); 5. film trap 6. dustproof mirror 7. transparent toughened glass 8. deielectric-coating reflective mirrors 9. power leads 1.0 freeing port 1.1. water inlets 1.2 lens adjustment knobs 1.3 anti-phase mirrors are regulated knob

Fig. 3:

1. 5. film trap 6. reflective mirrors 7. condensers 8. concavees lens of casing 2. anti-phase mirror 3. magnifieres, 4. light sources (bulb)

Among Fig. 1: on the lantern slide or material object of the illumination of light source 4 in film trap, the light of reflection becomes a handstand color images via poly-phase magnifier 3, passes through anti-phase mirror again, becomes upright color images on screen.The light that deielectric-coating reflective mirror 8 is used to reflect bulb highlights to film trap; Regulate knob 12 and 13 and be respectively applied for the poly-height of intensified image mutually of adjusting and the angle of anti-phase mirror, so that the clear picture that is become.The heating because high-power lamp is steeped oneself-meeting, in order to cool off casing, so casing makes interlayer, interior dress water is made liquid coolant, and the 11st, water inlet, the 10th, freeing port.

Claims

1, a kind of overhead projector contains casing 1, anti-phase mirror 2, and poly-phase amplifying lens 3, light source 4 and film trap 5 is characterized in that: light source 4 places film trap 5 tops in casing.

2, according to the overhead projector of claim 1, it is characterized in that: casing 1 is an interlayer, in liquid coolant (general water) is arranged.

3, according to the overhead projector of claim 1, it is characterized in that: there is a transparent toughened glass film trap 5 tops.