• Miniature Leaf Spectrometer

Miniature Leaf Spectrometer

  • Ultra-portable field ready unit with built-in leaf probe is perfect for fast and easy leaf analysis
  • Wide range spectrum (400-1000nm) covering PAR and NIR
  • Ultra-high resolution (~1.5 nm FWHM)
  • Real time display of measured spectrum
  • Lightweight (290g) and truly portable
  • Measures transmission and reflectivity


The CI-710 Miniature Leaf Spectrometer is designed to measure the transmission, absorption, and reflection of light by biological substances, such as leaves, within a wide range of wavelengths that cover visible and Near Infra-Red (NIR) light. Absorption spectrum or reflectivity measurements are the most common applications of spectrometers. The spectrum can be used for the quantification of chemical concentrations, color analysis, the study of photochemical reactions such as photosynthesis, and the quantification of physical or optical properties such as film thickness, index of refraction, and extinction coefficient. A biological system may absorb light efficiently at a certain range of wavelengths and transmit/reflect other wavelengths of light. For example, most photosynthetically active green leaves strongly absorb blue/blue-green light and reflect red and yellow light. The presence of different pigments, organic compounds, or inorganic chemicals in biological substances may exhibit distinct characteristics in the wavelength spectrum. These unique spectral characteristics can provide useful information for many physiological studies of biological systems, including:
  • Studies directly related to the pigments in leaves – photosynthesis, genotyping, environmental stress, disease detection/prevention
  • Chemical detection/monitoring – N, sugar, water
  • Leaf surface characterization by reflectivity measurement


How it works
The CI-710 has a compact optical bench coupled to a Linear CCD array detector. It accepts light energy transmitted through strands of optical fiber and disperses the light via a fixed grating across the CCD array, which is responsive from 400-1000nm.

The CI-710 can be connected to an object such as a leaf which can be scanned to obtain graphic outputs or digital data readings of the transmission, reflection and absorption spectra.


Physical Specifications
Dimensions 89.1 mm x 63.3 mm x 34.4 mm
Weight 190 grams
Wavelength range 400-1000nm
Optical resolution ~1.5 nm FWHM
Integration time 3.8 ms - 10 seconds
Stray light <0.05% at 600 nm; 0.10% at 435 nm
Optical Properties Light intensity, absorbance, Reflectivity, Irradiance
Optical Sample Size 7.6 mm
Power consumption 250 mA @ 5 VDC
Data transfer speed Full spectrum to memory every 4 ms with USB 2.0 port
Inputs/Outputs Yes, 8 onboard digital user-programmable GPIOs
Analog channels No
Auto nulling Yes
Breakout box compatible No
Trigger modes 4 modes
Strobe functions Yes
Connector 22-pin connector
Power Supply USB powered via laptop or PC
Operating systems Windows 98/Me/2000/XP, Mac OS X and Linux with USB port
Computer interfaces USB 2.0 @ 480 Mbps (USB1.1 compatible)
Detector Specifications
Detector Toshiba TCD134AP Linear CCD array
Detector Range 400-1000nm
Pixels 3648 pixels
Pixel Size 8 μm x 200 μm
Pixel well depth 100,000 electrons
Signal-to-noise ratio 300:1 (at full signal)
A/D resolution 16 bit
Dark noise 50 RMS counts
Corrected linearity >99.8%
Sensitivity 130 photons/count at 400 nm;
60 photons/count at 600 nm
Dynamic range 2 x 108 (system), 1300:1 for a single acquisition