The choice to buy the projector lens and the brightness is directly related to
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On Projector The Purchase of common sense, people tend to pay more attention to Projection Machine performance parameter (eg: resolution, contrast, brightness), bulb life and other aspects of performance, few people will be interested in purchasing when the projector Shot How did it perform? In fact, for the projector, the lens is the projector light path in the last part of the lens do good or bad, can do the minimum aperture value, and brightness are directly related.
Fact, theoretically, projectors and digital camera lens is essentially the same, they are optical lenses, are also using the light refraction, and have used the mirror transmittance. However, between the projector and camera applications are different in nature and effect to be achieved is different, so they will be in the specific details of their design and function to show the difference.
In addition, the projector lens in addition to other differences in quality, the most critical parameter is the aperture size of f value, f is the rate of light through the lens.
Practical use to choose a suitable value of the lens F
Lens focal length determines the lens in the projector and screen from the form under certain conditions can the size of the image. The shorter focal length lens, the image projected on the screen the greater.
Choice in the projector, the application of the general places, in the same price, should give priority to the selection standard lens, standard lens in the projection image of color reproduction, image distortion is the best! Applications for small spaces, to large-size projection images, should give priority to using the short focal lens (of course, conditions permitting, it could be considered the standard lens in the projector light path refraction using large-size projection images obtained by means of the method ).
Applications for large areas, abundant in resources, giving priority to long telephoto lens, as this installation method, the advantages are many. First, the projector's fan noise impact on the viewer get a good inhibition, followed by the viewers on the impact of the projector (smokers soot, diners food debris, hot steam) factors, telephoto projection machine of the smallest! This is for the projector to create a comfortable working environment, easy to run the projector's longevity.
And aperture value, all in the choice of the projector when the projector through the control of different aperture values, you can know which set of products projector Power supply Utilization, for different aperture values, but the same brightness projector products, the value of a small aperture (large aperture) of projector products, the lamp power must be smaller than the aperture large projector products. It is about the energy saving.
General, high-end large-scale projector brands can generally be different for different size of image size and the corresponding projection distance lenses. Can be changed according to different needs of the general lens are: to shorten the distance applications, wide-angle projection lens, in order to shorten the application of rear projection distance and wide-angle lens, and extend the application of projection distance telephoto lens. These different lens focal length is very easy to replace, in general, operators do not need any tools in just 1-2 minutes under the conditions to complete.
Currently, global trade, in addition to a handful of digital cameras, projectors, projector manufacturers to conduct their own research and development of the lens, the projector manufacturer for the most part of the lens (optical component) approach is to buy the lens manufacturer related finished products. In the camera's lens manufacture, the most advanced processing technology of optical glass is optical glass lens molding Technology It is a high-precision optical components and processing technology is to soften the glass into high-precision molds, the pressure in the heating and anaerobic conditions, the one-time out to use direct compression molding of optical components required.
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