Overhead projectors

Overhead projectors (OHP) are an alternative type of projector to the LCD projectors. Overhead Projectors are the more traditional presentation projector used to project an image from a transparency on to a screen or wall. Sometimes these are also referred to as manual slide projectors.

An overview of Overhead projectors:

The basic components of an overhead projector are a large box that contains a bright lamp with a fan to facilitate cooling & above this box is a lens that focuses the light from the bulb. Above the box, typically on an extended arm, is a mirror and lens that focuses and redirects (projects) the light forward instead of up. To use OHP Projectors for display purposes, the information to be projected must be printed on a see-through sheet known as a transparency. You can make changes to the sheet whilst presenting and the changes will be projected directly on to the screen.

Common Uses:

» Lectures
» Corporate level discussions
» Business conferences

Future:

Over the years, overhead projectors have been replaced by modern devices like interactive whiteboards, LCD Projectors & other such projection systems. Also, with the arrival of Microsoft PowerPoint the task of creating presentations rather than handwritten transparencies became a much simpler task. Also, the transparencies can be quite costly, especially if colored.

Difference between over head projector presentations & computer based presentation

» The presenter can make hand written changes to a transparency whilst giving a presentation. This is especially useful when delivering lectures & other such interactive discussions.

» The presentation on computer can be developed quite easily & are very inexpensive. The transparencies for an OHP can be quite costly.

» Overhead projectors tend to be much larger and less portable than laptops and other types of projector.

» The projectors bulbs need to be replaced quite regularly

To buy quality OHP supplies & Accessories by leading brands at affordable prices contact us TODAY!!