The brightness evaluation of tungsten wire can be carried out in the following ways:
- Use photometer to measure
In industrial production and scientific research experiments, photometers are usually used to accurately measure the brightness of tungsten wires. The specific steps are as follows:
Place the tested tungsten wire in the test area of the photometer.
Set appropriate parameters for measurement according to the operating steps of the instrument.
According to the measurement results, the luminous flux, illuminance and other parameters of the tungsten wire can be obtained, so as to know its brightness.
The photometer is a very accurate and reliable measuring device that can measure the brightness of various light sources, including artificial light sources and natural light sources. However, using a photometer for measurement requires professional technical knowledge and experience, and the price of the instrument is relatively high. It is generally suitable for scientific research and industrial laboratories.
- Compare color temperature for estimation
Color temperature is a parameter for measuring the color of the light source, and the color temperature of most tungsten wire lamps is around 2700K. Therefore, the brightness of the tungsten wire lamp under test can be estimated by comparing the color difference between the color of the tungsten wire lamp under test and the color of the standard color temperature bulb. There are two ways to compare color temperature:
Observation with the naked eye: requires certain observation experience and good ambient light conditions.
Use a color thermometer: The color thermometer is more accurate, but the price is also higher.
- Evaluation skills and precautions
When evaluating the brightness of tungsten wires, you also need to pay attention to the following skills and matters:
Ensure the life of the bulb: Before measuring the brightness of the tungsten wire, ensure that the bulb has reached its design life and the brightness does not deviate from the normal range.
Instrument calibration: When using a photometer for measurement, the instrument needs to be calibrated to ensure the accuracy of the measurement results.
Select a standard bulb: When using the comparative color temperature method for measurement, a standard color temperature bulb should be selected for comparison to reduce errors.
Reduce interference light: During the measurement process, the influence of surrounding interference light should be minimized to ensure measurement accuracy.
Adjust the measurement distance and angle: For high-brightness tungsten wires, the measurement distance and test angle should be appropriately reduced to obtain more accurate measurement results.
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