convex dielectric mirror 63mm 2m radius

Product Description

Surplus Convex Dielectric Mirror – 63mm Diameter, 2m Radius of Curvature

This precision convex mirror is a high-quality optical component ideal for applications requiring beam divergence or wide-field reflection. The front surface features a multi-layer dielectric coating optimized for high reflectivity in the visible spectrum (approximately 400-700 nm), providing excellent performance in laser optics and experimental setups. The convex curvature (with a gentle 2-meter radius) produces diminished, upright virtual images, making it suitable for use as a diverging mirror in beam expanders, optical testing equipment, or custom imaging systems.

Originally from a laser optics supplier (likely Lumonics or similar), this mirror bears the marking “2MCX,” confirming its 2m radius convex design. The Lumonics heritage connects it to a pioneering company in industrial and scientific laser development, now continued by LightMachinery .

Note: The rear plano side has surface hashes (scratches/markings) that prevent effective use from that orientation, so this is intended for front-side reflection only. The fused silica substrate maintains structural integrity with no impact on the coated convex surface.

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Key Specifications

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Material Advantages – Fused Silica

Fused silica is an exceptional substrate material for precision optics, offering:

• Low Thermal Expansion: Coefficient of thermal expansion ~0.50 x 10⁻⁶/K, providing dimensional stability across temperature variations .

• High Thermal Stability: Critical for maintaining optical performance in laser systems and variable environments .

• Excellent Transmission: Suitable for a wide range of wavelengths.

• Mechanical Durability: Resists environmental degradation and maintains figure under stress.

These properties make fused silica the preferred choice for high-performance mirrors in demanding applications .

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Applications

Laser Beam Expansion and Divergence:

• Ideal as the diverging element in reflective beam expanders for laser systems

• Reflective expanders offer achromatic performance free from chromatic and spherical aberration, making them ideal for UV, IR, broadband, and ultrafast lasers

• Compatible with a wide range of laser sources including excimer, Nd:YAG, Ti:Sapphire, and tunable lasers

Optical Experiments and Testing:

• Educational labs and university research

• Prototyping optical systems

• Beam profiling and characterization setups

Custom Imaging Systems:

• Wide-field reflection applications

• Low-magnification viewing systems

• Beam steering and control

Telescope and Instrument Integration:

• Secondary mirrors in reflective telescope designs

• Beam conditioning in spectroscopic instruments

The convex mirror design produces diminished, upright virtual images, making it particularly useful for expanding beam diameters and controlling divergence in optical paths .

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Condition

SURPLUS – EXCELLENT OPTICAL QUALITY ON COATED SIDE
FRONT SURFACE: Pristine, no visible coating defects
REAR SIDE: Surface hashes (scratches/markings) – unusable for reflection
SUBSTRATE: Structurally sound, no impact on coated surface
MARKING: “2MCX” clearly visible

⚠ USAGE NOTE: This mirror is intended for front-surface reflection only. The rear side has surface markings that preclude effective use from that orientation. This does not affect performance when used as designed.