本帖最后由 wu_lee 于 2014-6-8 11:18 编辑

以下是Osram 一篇关于LEDs for Flash Applications 的介绍，主要涉及LED在手机照明领域的应用和相关补偿光的值的要求。
我们知道手机照明讲究光照的均匀性，而且根据手机镜头的视场的不同，对补偿光也有不同的要求，我们从最基本的开始了解，然后再到透镜的设计。以下内容和将要发表上来的都是一些个人理解，不在文字方面做太过详细的描述，大虾们请略过，有不同见解的，请交流一下。
摘文：
In mobile phones, the minimal illuminance depends on the optical resolution of used camera chip .
Nowadays, camera modules with between 3 and 5MPixel are used as standard for most mobile devices. For these, the minimal center illuminance should be from 80lx to 200lx at 1m.
For the currently high end devices with 8MPixel or more, the light requirements are even higher, starting at 300lx.
However depending on the customized uniformity demand of the illuminated target area the light level in the center can vary from the given values.

Typical center illuminance in 1m vs. resolution of the camera chip
(早期智能手机镜头像素与补偿光中心光照图表)
Moreover in most applications, the flash should cover a rectangular field of view, e.g.
55° x 43°. In the center of this field, the requested illuminance level should be
achieved. The illuminance in the corner of this field of view is, dependent on the
desired homogeneity, around 20% to 40%.
附上全档，Flash Applications Note。

• LEDs for Flash Applications.pdf