custom meniscus lens-mirror hybrid WFOV telescope

Product Description

Rare Premier US Defense Space Optics Research Laboratory Custom-fabricated Meniscus Lens-Mirror Hybrid: Precision WFOV Telescope Secondary Element

Discover a truly one-of-a-kind precision optic sourced directly from a premier US Defense Space Optics Research Laboratory’s advanced research initiatives. This custom-fabricated meniscus lens-mirror hybrid, originally part of a Wide Field of View (WFOV) Telescope Assembly, represents the pinnacle of optical engineering for high-stakes applications in defense, aerospace, and scientific imaging. Crafted by Materion Barr Precision Optics —a leader in ultra-precise components for government and R&D projects—this piece underwent a specialized repolish process to ensure flawless surface figure and performance, making it irreplaceable for collectors, researchers, or engineers seeking premium surplus optics .

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Key Specifications

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Design & Engineering Excellence

Hybrid Functionality:
This optic uniquely combines refractive and reflective elements in a single component:

• Central 50mm Diameter: High-reflectivity patterned mirror coating (protected aluminum) acts as a secondary reflector for the telescope system

• Surrounding Annular Region: Precision-transmissive with broadband AR coatings on both surfaces

• This integrated design enables compact, aberration-free WFOV imaging without the alignment complexity of separate elements

Aspheric Meniscus Form:
The convex-concave meniscus shape with custom aspheric surfaces provides exceptional aberration correction:

• Minimizes coma, astigmatism, and distortion across wide fields of view

• Enables compact catadioptric telescope designs

• Superior to spherical equivalents for wide-angle applications

Fiducial Alignment System:
Two deliberate fiducial lines (one narrow, one broader, crossing at a non-90° angle) provide:

• Precise orientation during assembly, testing, or integration

• Verification of rotational alignment in multi-element optical trains

• Clear indication of this component’s role in mission-critical setups

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Material & Coating Advantages

High-Purity Fused Silica Substrate:

• Exceptional thermal stability (ultra-low expansion coefficient)

• High purity minimizes absorption and scatter

• Crystal-clear transparency from UV through near-IR

• Ideal for environments with temperature fluctuations or high-energy light paths

• Proven performance in space and defense applications

Precision Coatings by Materion Barr:

• Central Mirror Region: Protected aluminum with dielectric enhancement for broadband high reflectivity

• Transmissive Region: Multi-layer AR coatings on both surfaces, optimized via specialized production runs

• Edge Coating: Gold-colored protective ring (2.75mm wide) for environmental sealing and handling protection

• AR Performance: <1% reflectivity per surface, maximizing throughput in catadioptric systems

Repolished for Optimal Performance:
This optic underwent a specialized repolish process to ensure:

• Flawless surface figure (λ/10 or better wavefront quality)

• Minimal scattered light

• Like-new performance at a fraction of replacement cost

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Applications & Uses

Astronomy and Research:

• Perfect as a secondary mirror in custom Cassegrain or Ritchey-Chrétien telescopes

• Enables wide-field stargazing, exoplanet detection, or atmospheric studies with reduced coma and astigmatism

• Ideal for compact, high-performance observatory instruments

Defense and Surveillance:

• Suited for advanced imaging systems in drones, satellites, or ground-based sensors

• Hybrid design supports high-resolution monitoring over large areas without bulky hardware

• Proven pedigree from defense research applications

Laser and Photonics:

• Excellent for beam steering, focusing, or combining in laser communication setups

• Robust fused silica material and durable coatings handle high-power inputs

• Suitable for free-space optical links and directed energy research

R&D Prototyping:

• Integrate into experimental optical benches for hyperspectral imaging, adaptive optics, or machine vision

• Leverage its proven pedigree to accelerate development timelines

• Test advanced optical concepts without the cost of custom fabrication

Educational/Collectible:

• A unique artifact for optics enthusiasts, museums, or labs

• Demonstrate principles of aspheric design, catadioptric systems, and precision fabrication

• Hands-on education in advanced optical engineering

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Why This Optic is Truly Rare

This optic’s rarity stems from its custom origins at a premier US Defense Space Optics Research Laboratory, a hub for cutting-edge technologies in remote sensing, surveillance, and space-based optics. Unlike off-the-shelf components, it was engineered for a specific WFOV telescope prototype, blending refractive and reflective elements to achieve compact, aberration-free imaging over expansive fields—capabilities that command premium value in the surplus market.

Key differentiators from commercial optics:

• Custom-designed for a specific defense research application

• Fabricated by Materion Barr, a leading supplier for government and R&D projects

• Hybrid lens-mirror functionality not available as a standard product

• Fiducial alignment system indicates mission-critical integration

• Repolished to ensure like-new performance

• Direct from a premier US defense laboratory—traceable provenance

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Condition & Packaging

⚠ HANDLING NOTE: This is a precision optical component. Cleanroom protocols should be observed during handling. The protective edge coating and fiducial marks should be preserved.