Discussion on Satisfactory Conditions of Illuminance Meter
Do you often use your intuition to judge the brightness of a light source or use the same method to judge which of similar products is brighter, do you know how big the possible difference is? Whether the light distribution of a lamp is consistent with the original design, I think everyone must also be very concerned; as a pioneer in the lighting industry, you and I should really make good use of this lighting tool-illuminance meter. Faced with many different brands of illuminance meters, the gap between their quality and price is also very wide. How to make an appropriate choice is often a headache. Here is a simple explanation:
A satisfactory lux meter should have the following conditions:
● Small size, light weight (Compact Size, Light Weight)
The opportunity to use the illuminance meter is very wide, and the timing of application is often in different places, so the portable light meter is small in size and light in weight. The first prerequisite for the illuminance meter.
● Accuracy [Accuracy]
Whether the illuminance meter is good or not is closely related to its accuracy. Of course, it is also closely related to its price, so it is necessary to buy a lux meter with high accuracy at a reasonable price. Generally, the error should not exceed ±15%.
● Color compensation [Color Compensation]
The types of light sources are all-encompassing, some focus on red high-pressure lamps with longer wavelengths, or blue-purple series such as Daylight fluorescent lamps with shorter wavelengths; there are also more evenly distributed ones such as incandescent bulb series, the sensitivity of the same illuminance meter to different wavelengths may be slightly different Therefore, appropriate compensation is necessary.
● Cosine Compensation [Cosine Compensation]
We all know that the brightness of the illuminated surface is related to the incident angle of the light source. In the same way, when measuring with an illuminance meter, the incident angle between the sensor [Sensor] and the light source will naturally affect the reading value of the illuminance meter. Therefore, whether a good illuminance meter has the function of cosine compensation cannot be ignored.
