Integrating sphere
AssigneeYokogawa Electric Corporation
InventorsKazufumi Nishida, Kumiko Horikoshi, Hitoshi Hara
Life of this patent
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Abstract
An integrating sphere (10) of the present disclosure includes a hollow member (1) and a diffusive coating (4), on the inner surface of the hollow member (1), configured to scatter and reflect light from a light source within the hollow member (1) to yield diffused light. The diffusive coating (4) is coated with a hydrophobic coating (5). The accuracy of optical measurements using the integrating sphere (10) is improved by suppressed moisture absorption of the integrating sphere (10) and suppressed fluctuations in the efficiency of the integrating sphere (10).
Claims4
An integrating sphere comprising:
- a hollow member;
- and
- a diffusive coating, on an inner surface of the hollow member, configured to scatter and reflect light from a light source within the hollow member to yield diffused light,
- wherein the diffusive coating is coated with a hydrophobic coating,
- the diffusive coating comprises barium sulfate powder and a polyvinyl alcohol binder,
- the hydrophobic coating includes a powder of a hydrophobic resin and a binder of a hydrophobic resin,
- the powder of the hydrophobic resin is transparent at a wavelength of the light, and
- the binder of the hydrophobic resin is transparent at a wavelength of the light.
Dependencies are inferred from the claim text.