105mm parabolic mirror fused silica

Product Description

105mm Diameter Parabolic Concave Mirror – f/5, Fused Silica Substrate

This is a high-precision parabolic primary mirror on a fused silica (quartz glass) substrate, offering exceptional thermal stability and optical performance. Ideal for astronomy, laser optics, and educational experiments requiring sharp, aberration-free imaging.

Key Specifications:

• Diameter: 105 mm (≈4.13 inches)

• Focal Length: 525 mm

• f-Ratio: f/5

• Figure: Parabolic (corrects spherical aberration)

• Substrate: Fused Silica (ultra-low thermal expansion, high homogeneity)

• Coating: Protected/Enhanced Aluminum (high reflectivity, durable overcoat)

• Condition: Excellent – clean reflective surface with only minor cosmetic handling marks; no chips, deep scratches, or performance impact

Optical Performance:

• Sharp On-Axis Imaging: Parabolic figure eliminates spherical aberration

• Thermal Stability: Fused silica minimizes focus shift with temperature changes

• High Reflectivity: ≈90–95% in visible spectrum

Applications:

• Astronomy: Primary mirror for a 4-inch Newtonian or Dobsonian telescope; ideal for planetary and wide-field viewing

• Laser & Beam Optics: Collimation, focusing, or beam steering for visible/near-IR laser systems

• Education: Demonstrations of parabolic vs. spherical aberration, interferometry, or image formation

• DIY Projects: Solar projectors, custom optical benches, or precision collimation tools