LED flashlight lens specifications, characteristics and application

Preface:

This article refers only to the application in large power LED flashlight condenser lens specifications, application characteristics, using

 According to different using to do classification for flashlight:

1: military and police flashlight: using for military and police work (light high, range far, bright light exposure can cause short-term dizzy dazzles the blind eye);

2 commercially flashlight: such as doctors, aviation and railway and passengers and so on;

3: civil flashlight: such as civilian household flashlight flashlight, mini flashlight, meet in the night or general lighting;

4: special purpose flashlight: such as multi-function flashlight, equipped with high-voltage electric shock function, or it can be used as a table lamp desk lamp using, or colorful flashlight, or with other tools or function;

Flashlight lens materials, specifications:

1 in order to the high power LED flashlight lens use, materials for optical grade PMMA (it has a high optical transmittance and spotlight effects );

2 because of the use of different occasions, the lens specifications also have certain difference:

2.1. If police flashlight requirements lens condensation angle is relatively small ( 5 degrees ), small angle light more concentrated illumination stronger shoot farther;

2.2. Such as dental medical flashlight for the volume is relatively small, the lens diameter is also correspondingly smaller (usually 15mm-20mm );

2.3. Civil flashlight angle range is big, the flashlight lens can choose 10, 15, 30 degrees and other specifications;

2.4.flashlight because of only to meet the irradiation range, so the relative flashlight lens spotlight angles can also use relatively large such as 45 degrees, 60 degrees, so that in addition to when the flashlight is used, it also can be in power failure or emergency lamp used as table lamp;

3 flashlight lens using a single lens, a lens on a LED, you can also choose multiple lens corresponds to more than one LED execute module type condenser, thereby increasing the light intensity and realize remote irradiation such as steadyled is good ( CREE of 3 in one military police special flashlight lens UP-3W50-JT05 );

三．Flashlight lens with large power LED selection:

1 because of different brands of large power LED having different optical properties and light distribution curve, so the same flashlight lens with different brands of LED have different effects ( for example :angle，facula );

2 therefore the requirements for different LED and LED lens with the program according to different application occasions was determined;

2.1 it is to choose a single lens, or lens module;

2.2Irradiation distance and different scope determine angles;

2.3. According to different sizes and determine the flashlight lens diameter ( or height )

2.4 according to different brands of LED determine the different specifications of the flashlight lens;

2.5choose the flashlight lens mounting ways

3 in the same power ( current) situation requires more high-brightness flashlight please use the luminous flux at higher values of LED ( such as CREE, Z-power.);

4 needing smaller angle flashlight ,please use the CREE and Lumileds, because this two brands of LED fluorescent powder material consumption and small, the point light source area is small, easy to achieve the small angle light or small angle light time using high;

4.1 The most of the LED (Edison, Prolight Helio )are not suitable for 5 degrees in the spotlight, because of the light source area is large, if you have 5 degree, the utilization rate of the light less; this type of LED is more suitable for 15 degrees

 Supplement:

1 therefore in the spotlight effect and the use of different brands of large power LED, it has a great relations;

2 different specifications of lens selection has great relations; (such as intensity and range and the power design, current size, different LM values of LED),

3. flashlight can also adopt a reflective Cup ,it also can adopt reflecting cup and lens combination ( Modular ) condensing