Blog

• A Closer Look at Our 100 mm Meniscus Lens

  Oct 27, 2026

  A meniscus lens is an optical part with one convex surface and one concave surface. It looks like a crescent. It has two types: positive and negative. A positive meniscus lens gathers light together. A negative meniscus lens spreads light apart. The type depends on the difference between the two surface curvatures. How Lens Curvature Affects Optical Performance One of the key advantages of meniscus lenses is their flexibility in controlling optical aberrations. By carefully selecting surface curvatures and lens orientation, optical designers can reduce spherical aberration under certain conditions and improve overall system performance. However, a meniscus shape does not automatically guarantee better optical performance. Factors such as focal length, aperture, refractive index, and the s...

  Hot Tags : Custom Meniscus Lenses Spherical Aberration Precision Optical Components

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• Laser Window Degradation Before Burn Damage

  Oct 29, 2026

  Your laser protective window may look fine. There are no cracks, no clear burn marks, and no visible damage to the coating. But your laser cutting result becomes unstable. Welding quality gets worse. Or you have to increase laser power to get the same processing effect.   Why does this happen? The main reason is contamination. These tiny marks cannot be found by simple visual checks.   Optical Contamination: Tiny Deposits Cause Energy Loss When the laser works, small dust particles, smoke and oil residue will build up on the protective window. These deposits absorb or scatter part of the laser beam. Less laser energy reaches your material. The window does not need to look damaged to affect laser processing.   Thermal Lensing: Heat Changes the Laser Path The absorbed laser e...

  Hot Tags : Laser protective window Thermal lensing Beam distortion

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• Large size optical mirrors-customized lightweight optical parts

  Oct 22, 2026

  If the optical telescope is compared to human "clairvoyance", then the main mirror in the optical telescope can be called the "cornea". The larger the diameter of the main mirror, the higher the spatial resolution of the optical telescope. Generally speaking, it means you will see more clearly.    Large size optical mirrors are core components of high-resolution space Earth observation, deep space exploration and astronomical observation systems. Its manufacturing technology level is an important indicator of a country's development level of high-performance optical systems. Betensh Optics focus on providing customers with all kinds of customized lightweight optical parts.   Type: Flat surface, Spherical, Aspherical, Cylindrical, Special shaped,etc Material: Optical glass, F...

  Hot Tags : Large size optical mirrors customized optical parts factory Zerodur optics manufacturer Zerodur mirror aerospace optics manufacturer high precision mirror optics lens and mirror for telescope Astronomy mirror manufacturer

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• Rod lenses for medical field

  Oct 20, 2026

  When the ends of rod lenses are polished they may be used as circular lenses, and will have the same optical properties as a long circular lens with a narrow diameter. These lenses have an important application in rigid endoscopes, medical instruments used to view inside the human body.    Betensh Rod Lens Capacity   Material: Optical Glass, Sapphire Diameter: 0.5+mm Diameter Tolerance: 0.015 mm Thickness Tolerance: ±0.01 mm S/D: Better than 40-20 Flatness PV/WFE: λ/5 Centration: 4’ Coating: AR/Black chromed   Contact via sales@bts-optics.com

  Hot Tags : Endoscope Optics High precision rod lens Rod Lens factory Rod Lens for endoscope Rod Lens manufacturer Sapphire rod lens Rod lens for Laparoscopes Rod lens for Cystoscopes

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• Germany Endoscopy clients visit our factory to discuss cooperation.

  Mar 13, 2023

  On 13th March 2023, the Germany Endoscopy clients visited our factory and discussed further cooperation. We made rod lenses with four or five gluing processing technology to meet the requirement of no gap after glued, small chamfer and good coating. Clients visited our workshop and gave very high appraisal.    

  Hot Tags : lenses for endoscopy rod lens for endoscopy rod lens manufacturer in China

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• Optical Components Used in Refractor Telescopes

  Oct 15, 2026

  A refractor telescope uses lenses as its primary optical elements to collect and focus light. Its imaging performance depends on the design, material, precision, and coatings of several key optical components. 1. Objective Lenses The objective lens is the core component of a refractor telescope. Achromatic objectives typically combine crown and flint glass to reduce chromatic aberration at an affordable cost. APO objectives use specialized ED glass or fluorite to achieve better color correction, making them popular in high-resolution observation and astrophotography. Their tighter manufacturing tolerances and more complex assembly can also increase production costs. 2. Field Flatteners and Eyepieces Field flatteners correct field curvature, helping maintain sharp star images across the cam...

  Hot Tags : Refractor Telescope Achromatic Objective Lens APO Objective Lens Optical Coatings

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• What Is ISO 10110? A Guide to Optical Drawings

  Oct 13, 2026

  In optical manufacturing, even a small misunderstanding of a technical drawing can lead to production errors, delays, or unexpected costs. This is why clear and standardized specifications are essential.   What Is ISO 10110? ISO 10110 is an international series of standards for preparing technical drawings of optical elements and systems. It provides a standardized way to communicate optical specifications, helping designers, manufacturers, and quality inspectors interpret technical requirements consistently.   What Does ISO 10110 Cover? The ISO 10110 series addresses several important aspects of optical drawings, including: ü Surface Form Tolerances: Requirements for deviations from the intended optical surface shape. ü Centring Tolerances: Specifications related to th...

  Hot Tags : ISO 10110 Optical Drawings Optical Tolerances Optical Manufacturing

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