Teaching Technology Through Time
Westminster Audio Visual Services maintains an intriguing display of audio visual equipment that spans more than a hundred years of educational technology.
Housed in the Freeman Wing of the McKelvey Campus Center, this collection - assembled over the years by Audio Visual staff - exhibits (with few exceptions,) in display cases like the one pictured here unique teaching technology used in various Westminster departments and classrooms as far back as 1900.
Viewing guides are available at the display, and special guided tours may be arranged in advance with department staff.
These pieces may also be loaned out for demonstration and special display through arrangements with the Audio Visual Services office. (Some restrictions apply.)
For information on donating items to our museum, please see our policies page.
e-mail our office for more information on this special collection.
Light meters were a device used to measure the amount of light. In photography, a light meter is often used to determine the proper exposure for a photograph. Typically will include a computer which allows the photographer to determine which shutter speed and f-number should be selected for an optimum exposure, given a certain lighting situation and film speed. Light meters were used in the fields of cinematography and scenic design, in order to determine the optimum light level for a scene. They were used in the general field of lighting, where they can help to reduce the amount of waste light. They were also used in the home, light pollution outdoors, and plant growing to ensure proper light levels. The earliest type of light meters were called extinction meters and contained a numbered or lettered row of neutral density filters of increasing density. Two general types of light meters: reflected-light and incident-light.
o Reflected-light meters measure the light reflected by the scene to be photographed
calibrated to show the appropriate exposure for “average” scenes
o Incident-light meters measure the amount of light falling on the subject
uses an integrating sphere placed on top of the light sensor
Light meters were also used in illumination.