The equipment with LED for solar cell measurement
must satisfy the following conditions; use LED of plural
colors (4 or 6 colors used in this paper), arrange all LED on
the same plane like display. The reason is for illuminating
with plural colors because of the bright line spectrum of
LED, and for manufacturing small equipment. The schematic
illustration of the equipment is shown in Fig. I. The traditional
solar simulator condenses their lights with an integrator
lens, in contrast the equipment with LED illuminates an
object directly.