Chroma
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| Brand | Chroma |
|---|---|
| Origin | Taiwan |
| Model | CS-150 / CS-160 |
| Luminance Range | 0.0001–999,900 cd/m² (CS-150), 0.0001–9,999,000 cd/m² (CS-160) |
| V(λ) Photopic Luminous Efficiency Match | Improved vs. CS-100A |
| Measurement Method | Non-contact, Single-point Spectral Radiance Integration |
| Optical System | SLR-type with Eyepiece Viewfinder and External LCD Display |
| Minimum Measurable Spot Diameter | 0.4 mm (with optional macro lens, CS-160 only) |
| Power Supply | Rechargeable Battery |
| Brand | Chroma |
|---|---|
| Model | ET680sp |
| Type | Hard-Coated Interference Short-Pass Filter |
| Substrate | Fused Silica or BK7 (Customizable) |
| Cut-On Wavelength | 680 nm (Nominal) |
| Transmission Range | 200–680 nm |
| Blocking Range | 700–3500 nm |
| Peak Transmission | ≥95% (Typical, Uncoated Substrate Dependent) |
| Optical Density (OD) in Blocking Region | OD6–OD8+ @ 750–3500 nm |
| Edge Steepness (10%–90% Transition) | <15 nm |
| Coating Technology | Ion-Assisted Magnetron Sputtering (IAD) |
| Layer Count | 200–300 Dielectric Layers |
| Environmental Durability | MIL-C-48497A Compliant |
| Surface Quality | 20–10 Scratch-Dig |
| Parallelism | <3 arcsec |
| Clear Aperture | ≥90% of Diameter |
| Customization Available | CWL, Slope, Size, Mounting, AR Coating on Back Surface |