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Ocean Optics - Inventor of the World's First Miniature Spectrometer
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ISP-REF Integrating Sphere
The ISP-REF Integrating Sphere is designed for
applications requiring even surface illumination for reflectance
measurements -- such as in determining the color of flat surfaces. The
ISP-REF is 1.5" in diameter and features a transfer optic assembly
for restricting the fiber viewing angle, a 0.4" aperture sample port
and a built-in tungsten-halogen light source with 12 VDC adapter. The
sphere is coated with Spectralon®, a white
diffusing material that provides a highly Lambertian reflecting surface. A
simple switch allows users to manipulate the sampling optic for the
inclusion (I) or exclusion (E) of specular reflectance.
The ISP-REF Integrating Sphere is available
for only $1679. Replacement bulbs (item ISP-REF-B) for the illumination
source are available for $47.
The ISP-REF Integrating Sphere is small and
compact -- measuring just 54 mm x 57 mm x 83 mm (LWH) and
weighing 865 g -- yet it is durable enough for use outside the
laboratory. All instrument electronics -- including the lamp, which can be
replaced simply by removing two screws -- are mounted into the bottom
section of the unit.
User's Tip
The
reflectivity value obtained by calculating the difference between the
inclusion and exclusion of specular reflection is a direct measurement of
surface gloss.
The ISP-REF Integrating Sphere features SMA
905 Connectors for two optical fibers. The connector, or port, marked
"S" (for sample) is used to couple an optical fiber to the
spectrometer for the measurement of reflection from a flat surface. The
second port -- marked "R" (for reference) -- offers features unavailable with most other integrating spheres.
For example, one function of the R port is
to couple an optical fiber to a second channel in the spectrometer. This
channel can be used to monitor a reference the integrating sphere's
built-in tungsten halogen lamp, which provides even surface illumination.
The R port can also be used for coupling an optical fiber to
collect light. This may be advantageous for applications involving the
collection of a wide-angle beam of light, especially where the beam is
much larger than the size of the entrance optics. (The FOIS-1
Fiber Optic Integrating Sphere also serves this purpose.)
Specifications
| Spectral range (of
illumination source): |
360-1000 nm |
| Dimensions: |
54
mm x 57 mm x 83 mm (LWH) |
| Sphere diameter: |
1.5" |
| Weight: |
864.7
g |
| Sample port aperture: |
10.32
mm |
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Sphere coating: |
Spectralon (doped with
Barium Sulfate) |
| Reflectivity: |
>98%
(400-1500 nm)
>95% (250-2000 nm) |
| Reflectance
measurements: |
Specular included or
excluded |
| Bulb life: |
900 hours |
| Bulb color temperature: |
3100 K |
| Connector: |
SMA 905 |
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Contact an Ocean Optics Applications Scientist
Spheres
for Irradiance and Emission
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