240mm Fused Silica Parabolic Reflector with Silver Coating, f/0.625, 1/50λ Surface Accuracy, -40°C to 80°C Operation

Parameter Value Remarks
Aperture 240 mm Effective clear aperture
Focal Length 150 mm Distance from primary focus to mirror vertex
Focal Ratio (f/#) f/0.625 Focal length divided by aperture (150/240)
Surface Accuracy 1/80λ (RMS) Surface figure error (λ = 632.8nm, He-Ne laser wavelength)
Radius of Curvature 300 mm Calculated based on parabolic approximation (2× focal length)
Material Fused Silica Low thermal expansion coefficient, high stability
Thickness 30 mm Standard design balancing mechanical strength and lightweight
Coating Type Silver (Ag) + Protective Layer Reflective silver layer with protective SiO₂ coating to prevent oxidation
Reflectivity ≥98% (450–2000nm) High reflectivity of silver in VIS to IR spectra
Effective Clear Area 95% 95% of aperture utilized for transmission (228mm)
Surface Quality Scratch-Dig: 20-10 Optical surface cleanliness standard
Edge Treatment 0.5mm Chamfer Prevents edge chipping and ensures compatibility with mounting
Operating Temperature -40°C to +80°C Fused silica compatible with wide temperature range
Weight ≈3.2 kg Estimated based on fused silica density (2.2g/cm³)
Mounting Standard metal cell (6×M4 threaded holes) Uniformly distributed mounting holes, compatible with universal brackets
Design Wavelength Visible to IR (400–2500nm) Silver coating optimized for broad-spectrum applications
Image Space Infinite/Custom conjugate distance Default for collimated input; customizable for finite distances

Ultra-High Performance Parabolic Mirror Product Introduction

I. Product Overview

This ultra-high performance parabolic mirror is designed to meet the requirements of high-precision optical systems. It uses advanced manufacturing processes and high-quality materials, and has excellent performance in light focusing and reflection. It is widely used in scientific research, astronomical observation, laser processing, optical instruments and other fields.

II. Core Parameters

  1. Aperture and Focal Length: The effective clear aperture reaches 240mm, providing ample space for light transmission. The focal length is 150mm with a focal ratio of f/0.625, enabling efficient light focusing to meet the requirements of different optical systems for light convergence.
  2. Surface Accuracy: The surface accuracy reaches 1/80λ (RMS) (λ = 632.8nm, He-Ne laser wavelength). The near-perfect surface shape effectively reduces light scattering and distortion, ensuring clear and accurate imaging in optical systems.
  3. Radius of Curvature: Calculated based on the parabolic approximation, the radius of curvature is 300mm (2× focal length). The precise curvature design ensures the consistency and stability of the light reflection path.
  4. Material Properties: Made of fused silica, it features an extremely low thermal expansion coefficient and excellent chemical stability. It maintains stable optical performance in a wide temperature range from -40°C to +80°C, effectively reducing the impact of temperature changes on mirror accuracy.
  5. Coating and Reflectivity: With a silver (Ag) coating and a silica (SiO₂) protective layer, it achieves a reflectivity of ≥98% in the 450 – 2000nm wavelength range. This significantly improves light reflection efficiency, reduces light energy loss, and is suitable for a wide spectrum from visible to infrared light.
  6. Effective Clear Area and Surface Quality: The effective clear area accounts for 95% (228mm in diameter), making full use of the mirror surface. The surface quality meets the Scratch-Dig 20 – 10 standard, ensuring a clean and flawless mirror surface and reducing light reflection interference.
  7. Edge Treatment and Structural Design: The edges are chamfered at 0.5mm to effectively prevent edge chipping and improve the mechanical strength and durability of the mirror. The 30mm thickness structural design achieves lightweight while ensuring mechanical strength, with a weight of approximately 3.2kg.

III. Product Advantages

  1. High-Precision Optical Performance: The extremely high surface accuracy and precise curvature design enable accurate light focusing and reflection, meeting the requirements of applications with extremely high optical precision such as scientific research and precision instruments, ensuring accurate experimental data and clear imaging.
  2. Broad Spectrum Applicability: Maintains high reflectivity in the wide 450 – 2000nm spectrum, and can be widely used in fields requiring multi-spectral analysis or processing, such as spectrometers and infrared detection equipment.
  3. Excellent Environmental Adaptability: The fused silica material and special coating enable the product to work stably in harsh environments such as extreme temperatures and high humidity, reducing performance degradation caused by environmental factors and lowering maintenance costs.
  4. Superior Process and Durability: Advanced manufacturing processes ensure high mirror precision. Edge chamfering and a reasonable structural design enhance the mechanical strength of the mirror, extending its service life and providing users with long-term stable optical solutions.

IV. Application Areas

  1. Scientific Research and Astronomical Observation: In scientific research projects such as astronomical telescopes and high-energy physics experiments, with its high-precision optical performance, it helps researchers obtain clearer and more accurate observation data, facilitating scientific research breakthroughs.
  2. Laser Processing: The high reflectivity and precise light focusing ability enable efficient convergence of laser energy, meeting the requirements of high-energy density laser beams in laser cutting, welding and other processing technologies, improving processing precision and efficiency.
  3. Optical Instruments: Suitable for optical instruments such as microscopes and spectrometers, enhancing the optical performance of the instruments and providing reliable optical support for fields such as material analysis and biological research.
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