Luminance Measurement Device

A lux meter b luminance meter c digital camera.

Luminance measurement device. In photography a light meter more correctly an exposure meter is used to determine the proper exposure for a photograph. Prometric i series uses scientific grade ccd sensor that provide accurate and repeatable measurement in resolution ranging from 2 to 29 megapixels. A light meter is a device used to measure the amount of light. The photometric calibration leads to a reachable luminance range of six orders of magnitude from 0 08 cd m to 163 000 cd m.

Measurement instrumentation is commonly used to acquire multiple photometric measurements to assess the broad optical characteristics of a light source. The meter will include either a digital or analog calculator which displays the correct shutter speed and f number for optimum exposure given a certain lighting situation and film speed. Use of an imaging luminance measuring device to evaluate road lighting range hdr imaging luminance measuring device ilmd is based on four synchronous cameras figure 2. Whereas a photometer measures the intensity of light that passes through a solution a light meter measures the amount of ambient or reflected light.

The lux meter lxt consists of a measurement sensor and a small wall bracket or holder with a 1 5 m 4 9 ft cable and a light transmitter. Designed for r d and high speed in line production testing of display devices backlit symbols instrument panels keyboards and led products. A photometer and a light meter are instruments for measuring luminance the intensity of light. It is key to understand how all of these unique aspects come together.

A luminance meter is a device used in photometry that can measure the luminance in a particular direction and with a particular solid angle. For optimized response luminous intensity measurements are carried out in isolation without interference of ambient lighting. Rayclouds is a professional factory supplier of high sensitive luminance meter with years of focus. The simplest devices measure the luminance in a single direction while imaging luminance meters measure luminance in a way similar to the way a digital camera records color images.

While a photometer is sometimes called a light meter there are distinctions between these devices. Canon sx120is figure 1. A light meter is a device used to measure light levels. Prometric i series 2d luminance and color imaging.

Measurement instruments for luminous intensity. Light measuring devices there is growing awareness of the problem of light pollution and with that an increasing need to be able to measure the levels and distribution of light. Featuring with high sensitive high speed high accuracy it is widely used in backlight modules lcd displays oled various fpd etc. This paper shows how such measurements may be made with a digital camera.

Light level is the amount of light measured in a plane.