请问光学镜头参数

请问光学镜头参数
With the supplied 5.3mm lens and a subject
distance of 1" (25mm) from the front surface
of the circuit board, the sensor module will
"see" a square area roughly 5/32" (4mm) on a
side. This means that any color variation
within an area that size will be averaged by the explorer.
请哪位大哥仔细参详一下具体参数代表意义。
能否知道这个透镜焦距