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One side is coated with a hard dielectric long-pass optical filter film, and the other side is coated with an anti-reflection film to achieve high transmittance and high damage threshold.
Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.
Ecoptik China (also known as BRD Optical) has the advantages of wide cut-off band width, deep cut-off depth, high conversion steepness and high transmittance. It can be widely used in fluorescence excitation spectrum measurement, Raman spectrum application, spectrum grouping application, and astronomical observation application, etc. It can also be widely used in imaging optical system, machine vision system application, used to eliminate the interference light outside the available band, greatly improve the imaging clarity, as well as the sensitivity of the system.
| Material | BK7 |
|---|---|
| Transmittance | T>90% |
| Blocking Depth | OD2-OD4 |
| AOI | 0° or 45° |
| Surface quality | 60/40 |
| Clear aperture | >90% |
| Part No. | blocking Range (nm) | Blocking Depth | Transmission Range (nm) | Transmittance in pass band |
|---|---|---|---|---|
| LPF400 | 200-375 | >OD2 | 420-1200 | Tavg>85% |
| LPF425 | 200-405 | >OD2 | 445-1200 | Tavg>85% |
| LPF450 | 200-430 | >OD2 | 470-1200 | Tavg>85% |
| LPF475 | 200-455 | >OD2 | 495-1200 | Tavg>85% |
| LPF500 | 200-480 | >OD2 | 520-1200 | Tavg>85% |
| LPF525 | 200-550 | >OD2 | 545-1200 | Tavg>85% |
| LPF550 | 200-530 | >OD2 | 575-1200 | Tavg>85% |
| LPF575 | 200-550 | >OD2 | 600-1200 | Tavg>85% |
| LPF600 | 200-570 | >OD2 | 625-1200 | Tavg>85% |
| LPF625 | 200-595 | >OD2 | 650-1200 | Tavg>85% |
| LPF650 | 200-620 | >OD2 | 675-1200 | Tavg>85% |
| LPF675 | 200-645 | >OD2 | 700-1200 | Tavg>85% |
| LPF700 | 200-670 | >OD2 | 725-1200 | Tavg>85% |
| LPF725 | 200-695 | >OD2 | 750-1200 | Tavg>85% |
| LPF750 | 200-720 | >OD2 | 775-1200 | Tavg>85% |
| LPF775 | 200-745 | >OD2 | 800-1200 | Tavg>85% |
| LPF800 | 400-770 | >OD2 | 825-1200 | Tavg>85% |
| LPF825 | 400-795 | >OD2 | 850-1200 | Tavg>85% |
| LPF850 | 400-820 | >OD2 | 875-1200 | Tavg>85% |
| LPF875 | 400-845 | >OD2 | 900-1200 | Tavg>85% |
| LPF900 | 400-870 | >OD2 | 930-1200 | Tavg>85% |
| LPF925 | 400-895 | >OD2 | 955-1200 | Tavg>85% |
| LPF950 | 400-910 | >OD2 | 980-1200 | Tavg>85% |
| LPF975 | 400-935 | >OD2 | 1010-1800 | Tavg>85% |
| LPF1000 | 400-960 | >OD2 | 1040-1800 | Tavg>85% |
| LPF1025 | 400-985 | >OD2 | 1070-1800 | Tavg>85% |
| LPF1050 | 400-1010 | >OD2 | 1110-1800 | Tavg>85% |
| LPF1075 | 400-1035 | >OD2 | 1130-1800 | Tavg>85% |
| LPF1100 | 400-1060 | >OD2 | 1160-1800 | Tavg>85% |
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