Abstract: A portable device operable to identify photosynthetic activity and contents of compounds in a plant part. The portable device includes a light source including light-emitting diodes operable to irradiate the plant part with light. The portable device further includes a control module operable to have the light-emitting diodes emit the light as pulse signals. Additionally, the portable device includes a focus-adjustable lens and a filter optically coupled to the light source, where the adjustable lens and the filter are co-operable to consolidate light reflected from the plant part which may be irradiated by light from the light-emitting diodes. Furthermore, the portable device includes a detector optically positioned to receive from the focus-adjustable lens and the filter the light reflected from the plant part, where the light reflected from the plant part corresponds to the photosynthetic activity and contents of compounds in the plant part.

Abstract: An optical system for imaging. The optical system includes light emitting diodes to provide light of predetermined wavelengths. The optical system further includes a charge-coupled device to receive the light emitted by one or more light emitting diodes and reflected by an object for fluorescence imaging of the object. The optical system additionally includes a broadband light source to provide broadband light. Furthermore, the optical system includes a spectrometer to receive the broadband light emitted by the broadband light source and reflected by the object for visible-near infrared-shortwave infrared spectroscopy of the object. Additionally, the optical system includes a hyperspectral camera to receive the broadband light emitted by the broadband light source and reflected by the object for hyperspectral imaging of the object as well as a controller coupled to the light emitting diodes, the broadband light source, the charge-coupled device, the spectrometer and the hyperspectral camera.