Types of Projector Lamps

A projector lamp as the word describes projects any input given onto a large screen to serve a huge audience. The input may be of any kind such as audio, video, text, power point presentations, simulations, demonstrations and so on. Depending on the audience and the number of people present the type of projector differs. These can be broadly classified into three types namely overhead projector lamps, slide projector lamps and multimedia projectors.

Slide projector lamps are generally used in places where slide shows are of prime importance and used frequently. This is very useful due to its large capacity to store slide shows. This type of projector contains four major components. They are a fan-cooled light projector bulb, a reflector, a slide holder, condensing and focusing lens. These are the components necessary to perform the basic functions of a slide projector.

As all electronic gadgets a slide projector also requires a source of input which is light. This light source produces a light beam and the heat produced by the beam is then absorbed by a glass. This glass is the connector between the condensing lens and the photo slide to avoid any damage. This light on passing through the lens then enlarges the image in the lamps and projects it on the screen. There are a variety of slide projectors namely carousel slide projectors, single, dual, cube projectors, viewer projectors, and stereo projectors.

Overhead projector lamps are very similar to slide projectors. It consists of a projector lamp and a fan to cool it. There is a mirror and a lens that reflects the light forward fro projecting on the wall. Good quality lamps allow us to adjust the screws to move away or towards the lens to get a better focus. The image will be a brown or blue color coming on the outer edge of the screen. The projector bulb used here is an arc lamp. This increases the effectiveness and the bulb lasts for many hours more than the usual projector bulbs. Older lamps used quartz bulbs which isn't much effective. The life of quartz bulbs is comparatively less than that of arc bulbs.