Half Penta Prisms
A Half Penta Prism is a variant of the penta prism, typically fabricated by cutting a standard penta prism while retaining partial reflective surfaces to achieve specific optical functions (such as 45° deflection or partial image correction). This configuration offers unique advantages in compact optical systems and specialized imaging applications. How to select materials for Half Penta Prisms? Laser processing systems: Fused Silica(UV) or ZnSe(IR) with laser high reflectivity coating. Imaging systems: primary choice BK7 optical glass with wavefront correction optics. Extreme environments: Fused Silica (high-temperature and radiation resistant) or Ge (anti infrared interference). Comparison of Half Penta Prisms and Standard Penta Prisms Half Penta Prism: Number of reflection: 1 Half Penta Prism: Optical path deflection angle: 45° Half Penta Prism: The direction of the image: Possible reversal (correction required) Half Penta Prism: Volume: Smaller (space-saving) Half Penta Prism: Cost: Lower (less material)
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Penta Prism is a five-sided prism containing two reflecting surfaces at 45° to each other, and two refracting faces perpendicular to the entering and emerging beams. The standard Penta Prism reflecting surfaces are coated with aluminum or enhanced aluminum.
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