A Continuous Integrating Spectrophotometer

In pomology, besides developing a high yield and good tasty fruit (such as the apple), the appearance or color of the fruit is very important for marketing purposes. This paper describes an integrating spectrophotometer that senses the incoming and shade energy of the electromagnetic spectrum continuously in the region between 3840 and 8960 Å at eleven different wavelengths. The energies of these selected wavelengths are amplified, stored, and integrated. Thus, at the end of a growth period of any fruit to be studied, a total energy of each bandwave reaching the fruit will be available. The filters are placed in a Teflon dome and shaped and hung on the tree of the fruit to be studied.