point Light:
A point light source is idealized as a particle point light source. Point light source is an abstracted physical concept, in order to simplify the study of physical problems. Just like the smooth plane, mass points, and no air resistance that are usually said, point light sources do not exist in reality, and refer to light sources that emit light uniformly from a point to the surrounding space. Point light source is a new type of decorative light, mainly used for outdoor decoration such as building signs and KTV bars.
Area light source:
Surface light source refers to the mode of light emission. Compared with LED point light source and ordinary lamp light source, existing surface light source such as flat light source, LED surface light source has the characteristics of soft light, no eye damage, power saving, ceiling-type purification of natural light, etc. . The led surface light source is currently in the early stage of use, and is suitable for various types of lamps such as ceiling lamps, down lamps, high bay lamps, fluorescent lamps, bulb lamps and so on. Therefore, we will make the surface light source into a circle, a ring, a square, a strip, a triangle, etc. The long strip can be directly assembled to refrigerators, cabinets, bedsides, mirror lamps, foot lamps, etc. without adding heat sinks.
Line light source:
Line light source is a term for architectural lighting, which refers to a continuous lamp or luminaire whose total length of the luminous strip is much greater than the distance between it and the illuminance calculation point, which can be regarded as a line light source. "Linear light source" in physics: A point-like light source that emits continuous visible light. If its light travels linearly in only one direction in space, then this light-emitting point is called a line light source.
The difference between a line light source and a point light source lies in the shape of the light. The point light source is a concentrated point-like light. It is a long strip light. The general lamp specification is one meter long. The line light source products commonly used in lighting projects are mainly line lights and guardrail tubes. Wall washers can also be called line light sources, led purification lights and another one. It is a surface light source, generally referring to indoor flat panel lights, which emit light in a wide range as a whole.
The light source is far away from the receiver, and the light you receive can be close to parallel lines, so this light source can be called a surface light source at this time; for example, when the sun shines on us, the light received by our hands and the light received by our feet The light can be considered to be parallel, and the light on the whole body is parallel. At this time, we say that the source of illumination we receive is a surface light source; when the receiving source is replaced by the earth and the moon, or the Pacific Ocean and the Himalayas, this When the light reaches the two sides of the receiver, the angle difference is very large and cannot be ignored, so the emission source is called a point light source;
There are also line light sources, such as fluorescent lamps. The light emitted from different points on the light source reaches the same point on an object, and there is an angle difference between the lights. At this time, the light source is called a line light source.
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