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Optical Glass BK7 Right Angle Prism, Precision optical Components
Optical Glass BK7 Right Angle Prism, Precision optical Components
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A right-angle prism is a precision optical component with two 45° angles and one 90° angle. It is primarily used to bend a light path by 90° or to reflect light back at 180° (retroreflection). The prism relies on total internal reflection (TIR) for high efficiency when light enters through the legs.
Constructed from BK7 optical glass, it offers excellent transmission in the visible and near-infrared spectral regions, good homogeneity, and high surface quality, making it ideal for imaging, laser, and analytical optical systems.
📌 Key Features
- High transmission in visible and near-infrared ranges.
- Total internal reflection ensures high reflectivity without coating.
- Can act as a 90° reflector or 180° retroreflector.
- Precision polished surfaces ensure minimal scattering and distortion.
- Suitable for laser systems, imaging setups, metrology, and instrumentation.
🔧 Technical Specifications (Typical for 25 mm size)
|
Parameter |
Specification |
|
Material |
BK7 optical glass |
|
Size (Leg Length) |
5mm,10mm,20mm,25mm,30mm,40mm,50mm. |
|
Clear Aperture |
≥ 90% of central area |
|
Dimensional Tolerance |
+0.0 / −0.1 to −0.25 mm |
|
Angle Tolerance |
±3 arcminute |
|
Surface Flatness |
λ/4 to at 632.8 nm |
|
Surface Quality |
60:40 scratch-dig |
|
Chamfer |
~0.2–0.5 mm at 45° (typical) |
|
Wavelength Range |
350 nm – 2200 nm (visible to near-IR) |
|
Beam Deviation |
90° (single reflection) or 180° (retroreflection) |
|
Image Orientation |
Typically produces a left-handed image |
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