The Thunder Optics SMA905 Cosine Corrector is a compact optical accessory developed for spectral irradiance and light measurement applications.
Its PTFE diffuser provides a near-Lambertian response, enabling light collection over a wide field of view and coupling into SMA905 optical systems.
Cosine M – Male
Male SMA905 configuration designed for direct connection to compatible optical components.
Cosine F – Female
Female SMA905 configuration offering complementary connection geometry for flexible integration into spectroscopy setups.
Cosine Duo – Male + Female
Includes both the Cosine M and Cosine F versions, offering maximum flexibility for laboratory, educational and experimental applications.
A key feature of the Thunder Optics design is the interchangeable PTFE diffuser system.
Each Cosine Corrector is supplied with five interchangeable PTFE diffuser discs of different thicknesses, allowing the diffuser configuration to be adapted to different measurement requirements.
Included PTFE diffuser thicknesses:
0.1 / 0.2 / 0.3 / 0.4 / 0.5 mm
The Cosine Corrector body is made from two precision-machined, black-anodized aluminium parts, allowing the PTFE diffuser disc to be easily replaced.
Diffuser: Interchangeable PTFE
Included diffusers: 5 PTFE discs
Diffuser thicknesses: 0.1 / 0.2 / 0.3 / 0.4 / 0.5 mm
Connector: SMA905
Configurations: Male / Female / Duo
Construction: Black anodized aluminium
Application: Spectral irradiance and light measurements
Weight: 200 g
Dimensions: 3 × 2 × 2 cm
Connector: SMA905
Brand: Thunder Optics
Please select the required configuration from the eBay Configuration menu before purchasing:
Cosine M – Male
Cosine F – Female
Cosine Duo – Male + Female