Patent ID: 7015446

Claim:
A light source for an optical apparatus, comprising a light emitting device, a light receiving device for detecting the amount of light of said light emitting device, and light emission control means for controlling the amount of light of said light emitting device in accordance with the amount of light detected by said light receiving device, wherein said light receiving device is disposed on one side of said light emitting device to constitute an optical pair, and a plurality of said optical pairs are arranged on a substrate, wherein said plurality of light emitting devices are arranged at pitch P in a substantially straight line, and wherein P/W representing the ratio of said pitch P to a value W is set as 0.91<P/W<1.01, where W is a full width at half maximum (FWHM) of a light amount distribution curve measured in a direction in which said plurality of light emitting devices are arranged when each individual one of said light sources is singly operated to emit light.