Zoolied Inc.一 Concave Mirrors
2025-8-8
The plano-concave mirrors, featuring one flat and one concave optical surface, plays a vital role in laser technology, optical measurement, and imaging systems. Unlike conventional spherical mirrors, its asymmetric design offers unique advantages in beam shaping, divergence control, and optical system miniaturization.
Structural Characteristics and Optical Principles
With one precisely polished concave spherical surface and one optical flat, plano-concave mirrors combine reflective and divergent properties. When parallel light strikes the concave surface, the reflected beam diverges at an angle determined by the curvature radius (R). According to geometric optics, the focal length (f) follows the relation f = R/2, where the negative sign indicates beam divergence. This characteristic makes these mirrors indispensable in applications requiring beam expansion, such as laser beam expanders, optical resonators, and illumination systems.
Manufacturing Process and Performance Control
High-quality plano-concave mirrors rely on precision optical fabrication techniques. Manufacturers typically select low-expansion optical glass or fused silica as substrates, shaping the concave surface via diamond turning or precision grinding to achieve surface roughness below λ/10 (λ = 632.8 nm). To enhance reflectivity, the concave surface receives metal coatings (aluminum, silver, or gold) or dielectric high-reflection coatings. Notably, the flat side requires equal precision, with surface figure errors kept below λ/4 to avoid wavefront distortion. Modern magnetorheological finishing (MRF) can reduce surface roughness below 1 nm, minimizing scattering losses to under 0.2%.
Key Applications and Technological Advances
In laser systems, plano-concave mirrors frequently serve as output couplers in resonator designs. Orienting the flat side toward the laser gain medium while using the concave surface as the output mirror improves beam mode control and quality. Spectrometers employ these mirrors to compensate for astigmatism and enhance spectral resolution. Recent studies demonstrate that freeform-designed aspheric plano-concave mirrors effectively eliminate spherical aberration, proving particularly valuable in ultrafast laser systems. Furthermore, advancements in metasurface technology have enabled ultrathin plano-concave mirrors with thicknesses just 1/10 of conventional optics, opening new possibilities for miniaturized optical integration.
Zoolied offered in a variety of optical glass mirrors, such as Aluminum Coating Mirrors, N-BK7(H-K9L), Si mirror, plano Concave Mirrors, and single crystal Caf2 mirrors. Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR). Zoolied also offers standard and high precision Optical Mirrors in round ,rectangular, wedge mirrors and custom shape and size with different optical glass mirrors, Fused Silica, Sapphire, ZnSe, Zns and IR crystal. Looking for ideal optical mirrors Manufacturer & supplier? We have a wide selection at great prices to help you get creative. All the optical mirrors are quality guaranteed. If you have any question, please feel free to contact us.
Structural Characteristics and Optical Principles
With one precisely polished concave spherical surface and one optical flat, plano-concave mirrors combine reflective and divergent properties. When parallel light strikes the concave surface, the reflected beam diverges at an angle determined by the curvature radius (R). According to geometric optics, the focal length (f) follows the relation f = R/2, where the negative sign indicates beam divergence. This characteristic makes these mirrors indispensable in applications requiring beam expansion, such as laser beam expanders, optical resonators, and illumination systems.
High-quality plano-concave mirrors rely on precision optical fabrication techniques. Manufacturers typically select low-expansion optical glass or fused silica as substrates, shaping the concave surface via diamond turning or precision grinding to achieve surface roughness below λ/10 (λ = 632.8 nm). To enhance reflectivity, the concave surface receives metal coatings (aluminum, silver, or gold) or dielectric high-reflection coatings. Notably, the flat side requires equal precision, with surface figure errors kept below λ/4 to avoid wavefront distortion. Modern magnetorheological finishing (MRF) can reduce surface roughness below 1 nm, minimizing scattering losses to under 0.2%.
Key Applications and Technological Advances
In laser systems, plano-concave mirrors frequently serve as output couplers in resonator designs. Orienting the flat side toward the laser gain medium while using the concave surface as the output mirror improves beam mode control and quality. Spectrometers employ these mirrors to compensate for astigmatism and enhance spectral resolution. Recent studies demonstrate that freeform-designed aspheric plano-concave mirrors effectively eliminate spherical aberration, proving particularly valuable in ultrafast laser systems. Furthermore, advancements in metasurface technology have enabled ultrathin plano-concave mirrors with thicknesses just 1/10 of conventional optics, opening new possibilities for miniaturized optical integration.
Zoolied offered in a variety of optical glass mirrors, such as Aluminum Coating Mirrors, N-BK7(H-K9L), Si mirror, plano Concave Mirrors, and single crystal Caf2 mirrors. Multiple anti-reflection coating options are available for the Ultraviolet (UV), visible, or Infrared (IR). Zoolied also offers standard and high precision Optical Mirrors in round ,rectangular, wedge mirrors and custom shape and size with different optical glass mirrors, Fused Silica, Sapphire, ZnSe, Zns and IR crystal. Looking for ideal optical mirrors Manufacturer & supplier? We have a wide selection at great prices to help you get creative. All the optical mirrors are quality guaranteed. If you have any question, please feel free to contact us.
