Integrating spheres
Integrating spheres for the V-700 UV-Vis/NIR spectrophotometers
Integrating spheres are designed to measure either the diffuse transmittance or diffuse reflectance spectra of a liquid, solid or powder sample.
ISV-922/ISN-923/ISN-901i/ILV-924/ILN-925/ILN-902i/PIV-756/PIN-757/PIN-903i/IJV-726/IJN-727/IJN-904i/HISV-728/HISN-729 integrating sphere accessories
For standard measurements, UV-Vis or UV-Vis/NIR spectrophotometers measure the transmittance of a homogeneous, transparent liquid or solid sample. However, when a suspended liquid sample or opaque solid or powder sample is measured, the light incident upon the sample is diffusely transmitted or reflected and only a small portion of the scattered light reaches the detector, resulting in an inaccurate measurement. The integrating sphere accessory acquires most of the light diffusely transmitted or diffusely reflected from the sample into the integrating sphere and introduces it to the detector(s), providing a more representative measurement of the diffuse sample. JASCO integrating spheres have been designed for a variety of application and sampling requirements.
ISV-922 60 mm Integrating sphere for V-750/760
ISN-923 60 mm Integrating sphere for V-770
ISN-901i 60 mm Integrating sphere for V-780
The Model ISV-922/ISN-923/ISN-901i accessories are 60 mm integrating spheres with a smaller footprint to fit directly into the V-700 instrument sample compartment. These integrating spheres have a smaller sphere area, resulting in an increased signal-to-noise ratio for sample measurements at smaller bandwidth settings. All integrating spheres include a Spectralon reference tile, used for baseline correction of the integrating sphere. In addition, a specular reflectance exclusion sample holder is included as standard as well as a modified sample holder which will include the specular reflectance data with the collected spectrum. The 60 mm spheres have been designed with several different configurations to provide simple sampling methods for powders, solids and other scattering samples.
FCH-002 Fluorescence cut-off filter
A fluorescence cut-off filter permits accurate measurement of the transmittance/reflectance of a sample that also emits fluorescence (commonly, the 450 nm to 650 nm range with excitation near 300 nm). The optional filter is installed inside the sphere, before the internal sphere PMT detector. (Must be ordered with the integrating sphere, installed during manufacture.)
PSH-001 Powder Sample Holder
This optional accessory is used to measure the reflectance of a powdered sample.
Model RLH-603 Reference-Side Rectangular Cell Holder
This optional cell holder is used to install a rectangular cell on the reference side of the integrating sphere
(used as a reference for diffuse transmittance samples).
SSH-506 Solid Sample Holder (specific to 60 mm integrating spheres)
This sample holder is used to measure the transmittance of a solid sample.
Sample size:
Minimum 20 (H) x 20 (W) x 0.5 (D) mm
Maximum 70 (H) x 40 (W) x 35 (D) mm
60 mm Integrating Sphere specifications
| Wavelength range | 200 to 900 nm (ISV-922) 200 to 2500 nm (ISN-923) 200 to 1600 nm (ISN-901i) |
| Spectral bandwidth | UV 5 nm NIR 20 nm |
| Sample cell (Transmittance measurement) | Light path length 5, 10, 20, 30, 50 mm rectangular cell (sample side) |
| Sample size (Reflectance measurement) | Minimum 20 (Height) x 20 (Width) x 0.5 (Thickness) mm Maximum 65 (Height) x 50 (Width) x 25 (Thickness) mm |
| Beam | Approx. 7 (Height) x 4 (Width) mm at the position of the transmittance sample (when spectral bandwidth is UV 5 nm and NIR 20 nm)Approx. 8 (Height) x 9 (Width) mm at the position of the reflectance sample (when spectral bandwidth is UV 5 nm and NIR 20 nm) |
| Inside diameter of integrating sphere | 60 mm |
| Interior of integrating sphere | Coated with barium sulfate |
| Detector | Photomultiplier tube (ISV-922/ISN-923/ISN-901i) PbS photoconductive cell (ISN-923) InGaAs Photodiode detector (ISN-901i) |
ILV-924 150 mm Integrating sphere for V-750/760
ILN-925 150 mm Integrating sphere for V-770
ILN-902i 150 mm Integrating sphere for V-780
The Model ILV-924/ILN-925/ILN-902i accessories are 150 mm integrating spheres with a larger sampling area and fixtures for larger samples, with features for diffuse transmittance and diffuse reflectance measurements. The 150 mm spheres include an integrated light trap for exclusion of specular reflectance components from the sample. Spectralon reference tiles are included for baseline correction of the spectral data collected using the sphere. The larger sphere diameter corresponds to many international standards that require the larger sphere area, as compared to the 60 mm integrating spheres. Although the 150 mm sphere may have slightly lower signal-to-noise performance, the larger area vs. the ‘cutouts’ for the source entrances and sample area ports provides a greater integration capability for sample reflectance experiments.
Portable Integrating Sphere Specifications
| Wavelength range | 200 to 900 nm (Model ILV-924) 200 to 2500 nm (Model ILN-925) 200 to 1600 nm (Model ILN-902i) |
| Spectral bandwidth | UV 5 nm NIR 20 nm |
| Sample cell (Transmittance measurement) | Light path length 5, 10, 20, 30, 50 mm rectangular cell (sample side) |
| Sample size (Reflectance measurement) | Minimum 20 (Height) x 20 (Width) x 0.5 (Thickness) mm Maximum 100 (Height) x 50 (Width) x 30 (Thickness) mm |
| Beam | Approx. 9 (Height) x 5.5 (Width) mm at the position of the transmittance sample (slitwidth: UV 5 nm and NIR 20 nm)Approx. 13 (Height) x 6 (Width) mm at the position of the reflectance sample (slitwidth: UV 5 nm and NIR 20 nm) |
| Inside diameter of integrating sphere | 150 mm |
| Interior of integrating sphere | Coated with barium sulfate |
| Detector | Photomultiplier tube (Model ILV-924/ILN-925/ILN-902i) PbS photoconductive cell (Model ILN-925) InGaAs photodiode detector (Model ILN-902i) |
SSH-507 Solid Sample Holder (specific to 150 mm integrating spheres)
This sample holder is used to measure the transmittance of a solid sample.
Sample size:
Minimum 20 (H) x 20 (W) x 0.5 (D) mm
Maximum 70 (H) x 40 (W) x 35 (D) mm
PIV-756 60 mm Integrating sphere for V-750/760
PIN-757 60 mm Integrating sphere for V-770
PIN-903i 60 mm Integrating sphere for V-780
Integrating spheres for horizontal sampling, models PIV-756/PIN-757/PIN-903i, can mount the sample horizontally in a cup below the integrating sphere, ideal for powder samples. This integrating sphere can also be modified to provide measurements of smaller sample sizes by using a lens above the sphere, focusing the source energy onto the sample below the sphere. Diffuse transmittance measurements are performed by placing the sample on the upper surface of the integrating sphere.
IJV-726 60 mm Integrating sphere for V-750/760
IJN-727 60 mm Integrating sphere for V-770
IJN-904i 60 mm Integrating sphere for V-780
Models IJV-726/IJN-727/IJN-904i are dedicated integrating spheres to measure small samples such as gemstones. The accessory is based on a standard 60 mm integrating sphere with a ‘mask’ to provide a smaller illumination area for reflectance samples. A number of small fixtures are provided for mounting of gemstones, pearls and mounted stones within rings and other jewelry for analysis purposes.
HISV-728 60 mm Portable integrating sphere for V-750/760
HISN-729 60 mm Portable integrating sphere for V-770/780
This integrating sphere using an optical fiber can measure the diffuse reflection of various solid samples, such as pastes, clothing materials and food products.
Portable Integrating Sphere Specifications
| Wavelength range | 250 to 800 nm (Model HISV-728) 200 to 2500 nm (Model HISN-729) |
| Spectral bandwidth | UV 10 nm NIR 20 nm |
| Sample size | Minimum 30 (Height) x 30 (Width) |
| Inside diameter of integrating sphere | 60 mm |
| Interior of integrating sphere | Coated with barium sulfate |
| Detector | Photomultiplier tube (Model HISV-728/HISN-729) PbS photoconductive cell (Model HISN-729) |