What does ls represent in an optical power meter

In optical measurement devices, "LS" typically stands for "Light Source" or "Luminance Sensor," depending on the context of the meter.

Explanation

In the context of optical power meters, "LS" usually refers to the light source component of the system. For example, in devices like the UT697, the optical power meter is paired with an optical light source (LS) that provides specific wavelengths (e.g., 1310 nm and 1550 nm) for testing fiber optic networks, allowing the meter to measure the power of transmitted light accurately . The LS ensures that the optical power meter receives a stable and calibrated signal for precise measurements. In luminance meters such as the LS-100 or LS-110, "LS" can also refer to the luminance sensor, which measures the brightness of a light-emitting surface. These meters use a single-lens-reflex (SLR) optical system to ensure accurate targeting of the measurement area and can measure small areas with high precision . The LS designation in this case identifies the model series of the luminance meter.

Key Points

• Optical Power Meter Context: LS = Light Source, providing calibrated light for measurement.
• Luminance Meter Context: LS = Luminance Sensor or model series, measuring brightness of surfaces.
• Function: Ensures accurate, repeatable readings by providing a controlled light input or precise detection of luminance.
• Applications: Fiber optic testing, display brightness measurement, LED and CRT evaluation, and other optical engineering tasks . Understanding whether "LS" refers to the light source or luminance sensor depends on the type of optical meter you are using and the measurement being performed.