The most high-grade aluminum alloy shell, materials are poor good, the main difference in surface treatment, in general most flashlight as long as there is no special purpose is the oxidation of ordinary, with black, grey. Some flashlight is required to wear surface does not fade, it adopts three stage oxidation treatment, the treated surface is hard, with knife will not trace, but the price is high.
灯杯。光杯有橙面杯和光面杯,橙面杯的表面是凹凸不平的橘皮状,特点是反光均匀,照射出的光斑漂亮;光面杯的特点是反射效率高,聚光性能好,也就是远射效果好,但是照射出的光斑外圈比较暗。聚光是灯杯来控制的,灯杯越大焦点就越远,就能在更远处照出清晰更小的光斑来,当然电流太小的话也不会照那么远,另外灯杯深度和反射弧度什么的也是关键,若然光斑不仅不完美也会聚焦不好,透镜反射的原理就是这个,但一般玩家还是多看各商家及玩家做的评测,看谁的光杯更完美,聚光更好。聚光好的手电,光斑很小,这样就能在更远处仍能有明显光斑,若按照明来说,那近处照的范围也一样很小,做车灯就不行了,相反泛光好的灯杯,光斑大,近处照明范围比较大照明效果就很好,但远射就不行了,这是鱼与熊掌的关系,当然有调焦的就例外了。
Light cup orange surface cup and glossy cup, cup orange surface surface is uneven orange peel, characteristics of reflective uniform, the irradiation spot beautiful; glossy cup characterized by reflection high efficiency, good light gathering performance, but also is the long-range effect is good, but the irradiation spot outer of the dark. The spotlight is to control the lamp cup, greater focus more distant, can be in more distant as clearly smaller spot to, of course, the current is too small it will not care so far, another cup depth and reflex arc what is the key, if the spot is not perfect will focus is not good, is this lens reflex theory, but the evaluation of general game player or see the businesses and game player to do, see the light cup who is more perfect, the better. A good flashlight, beam is very small, thus far in the distance, can still have a clear spot, if the lighting, the lighting range near the same small lights, do not, instead floodlight cup, light spot, near lighting relatively large range of lighting effect is very good, but the long-range no, this is this relationship, of course focusing exceptions.