Fish eye ultra-short focus projector ViewSonic PJD5351 trial – Projector – Education Industry
Despite being a little financial turmoil, but in 2009 Projector Market is bustling, a large number of short focus projector market, 3D Technology In Projector Application, the emergence million 1080P projector, marked the projector market in 2009 is absolutely memorable. Looking back from the end of the market is undoubtedly the hottest technology in the widely used short-focus, in an office environment, living environment where increasingly smaller, short-focus projector appears to solve a variety of problems. From 2008 there were only 2,3 2,3 manufacturers introduced models Product comparison, in 2009 the major brands have a short focus projector product launch, There are already dozens of short focal products are Sell Both use DLP-technology products, there is also 3LCD-technology products, both short-focus zoom-type products, but also set short-focus focus-style products, both to BenQ , Epson Represented by the "Fish Eye" wide Shot Short focus projector, but also to Hitachi Reflection represented by a short focus projector, the product line has become increasingly rich.
Short-focus reflective projection technology Reflective lens is used reflective optical technology, that is, the projector lens to image onto a Mirror On, then Mirror Projection to the projection Screen On. This principle appears to be simple projection method, can in fact contrary to the requirements of high technology, is precisely the so-called simple hardest. As the projected image through the reflection to reach the screen, the image is easy because the little tiny mirror in error Projection screen The resulting image distortion and brightness uneven, so the manufacture of such short-focus projector optical component design and processing technology required is very high. Reflecting short-focus projector on the market is the most typical Hitachi The HCP-A6 and its HCP-A8 Projector, which projected 80 inches screen, only 62.6cm long.
"Fish Eye" Wide-angle short-focus projection
First contact with fish-eye lens is a professional SLR camera in the study, when the fish-eye lens camera with expensive, however, an ordinary fish-eye lens more than now a price of low-end projector. Fish-eye lens is an extreme wide-angle lens, for the lens to achieve maximum angle photography, this lens before the lens was parabolic shape protruding to the front of the lens, and the fish's eyes is quite similar, hence the name. Fish-eye lens is a special ultra-wide angle lens, the perspective it seeks to meet or exceed the scope of the human eye could see, and allow the barrel distortion caused by. Fisheye projector with similar, but not allow cylindrical projection screen is distorted and, therefore, can not achieve the kind of extreme fisheye camera, wide angle, short-focus projection, to be exact, the projector fish-eye lens should be a short focal wide-angle lens. With fish-eye lens of short focal Although the performance of different projectors, but this small space to cope with the distance from the point of view have been sufficient.
I am an expert from chinadrillingequipment.com, usually analyzes all kind of industries situation, while chinadrillingequipment.com provides the latest news, industry report and quality product, such as CFA Equipment manufacturer , china Waterwell Drilling Rig core drilling
Processing your request, Please wait....
