Bena Optics' ultra-large high-precision windows are primarily processed using large ring polishing machines. Bena Optics currently has the largest ring polishing machine with a diameter of 2 meters, capable of processing large optical flats with a diameter of around 1 meter while ensuring high surface accuracy. Additionally, various materials can be processed, including fused silica, SiC, and Zerodur.
Features of Super-size High Precision Window
Processing Characteristics and Challenges of Ultra-Large High-Precision Windows
The super-size high precision windows supplied by Bena Optics not only possess all the features of commercial windows but also meet high precision requirements on an ultra-large scale, which is the main challenge in processing.
Bena Optics focuses on the ring polishing method. The ultra-large ring polishing machines are sufficient to meet the size requirements of customers. Ring polishing is a relatively gentle and lengthy process.
Overview of CVD ZnSe Window
CVD zinc selenide window are made from zinc selenide (ZnSe) material synthesized through chemical vapor deposition (CVD). ZnSe is a yellow-transparent polycrystalline material known for its high purity, strong environmental adaptability, and ease of processing. It exhibits low optical transmission loss and excellent transmittance, making it particularly suitable for high-power laser systems.
Features of CVD ZnSe Window
CVD ZnSe windows exhibit high transmittance in the 600 nm to 16 �¼m wavelength range, making them well-suited for infrared spectroscopy applications.
Material Characteristics:
High Purity: The material boasts high purity, strong environmental adaptability, and ease of processing.
Low Absorption: It features a low absorption coefficient of less than 0.0005 cm^-1 at a wavelength of 10.6 �¼m.
Thermal Shock Resistance: The material has excellent thermal shock resistance, making it ideal for high-power CO2 laser systems.
Low Hardness: Due to its relatively low hardness, ZnSe is prone to scratches and typically requires a high-hardness anti-reflective coating for protection.
Applications for CVD ZnSe Window
High-Power CO2 Lasers:
Due to its high purity, strong environmental adaptability, ease of processing, and low optical transmission loss, CVD ZnSe is the optimal window material for industrial high-power CO2 lasers.
Infrared Applications:
CVD znse lenses excels in infrared applications, making it suitable for thermal imaging, FLIR (Forward-Looking Infrared) systems, and medical systems. Its low absorption coefficient and high resistance to thermal shock make it widely used in these systems.
The short pass filter is to transmit shorter wavelengths of light while rejecting longer wavelengths. The design of this type of filter makes it easier to separate excitation and emission wavelengths within the desired range, effectively isolating longer wavelength light without interfering with specific wavelengths.
Features of Short Pass Filter
High Transmittance: short wave pass filter have high transmittance and high cut-off depth, with transmittance typically reaching over 90%.
High Cut-off Steepness: These filters have a narrow cut-off bandwidth and high cut-off steepness, effectively separating excitation and emission wavelengths without interfering with the wavelengths of interest.
High Background Light Density: They possess a high background light density, effectively reducing background light interference.
Material Diversity: Short pass filter can be made from materials such as UV fused silica or optical-grade float glass, offering different transmission characteristics and cut-off wavelengths.
Application Fields of shortpass filter
Fluorescence Excitation Spectroscopy: Used to eliminate interference light outside the usable wavelength band, improving imaging clarity and system sensitivity.
Raman Spectroscopy Applications: Crucial for noise reduction in spectra and isolating specific spectral regions.
A plano-concave cylindrical lens has curvature in the vertical direction, functioning as a concave lens, while having no curvature in the horizontal direction. It is used to magnify a beam in a single direction, such as transforming a laser beam into a line or sheet of light, or altering the height of an image without changing its width. When combined with a concave cylinder lens, it can be used to shape the elliptical beam of a semiconductor laser into a circular one, among other applications.
Features of Plano Concave Cylindrical Lens
The cylindrical concave lens forms a diverging line-shaped virtual image and is primarily used to control the size of a beam in one direction. This lens consists of a flat surface and a concave cylindrical surface, with a negative focal length. Light passing through the axial meridian does not experience a change in convergence, but light passing through the refractive meridian does experience a change in convergence.
Applications of Plano-Concave Cylindrical Lenses
Beam Shaping:
Plano-concave cylindrical lenses are often used to convert collimated laser beams into line beams. By orienting the curved surface of the lens towards the light source, spherical aberration can be minimized, thereby achieving beam shaping.
Image Shaping:
A pair of plano concave lenses can be used for image shaping, particularly when it is necessary to shape a point source in one-dimensional direction.
Laser Scanning Systems:
In laser scanning systems, about plano concave lens are used to adjust the beam shape to meet scanning requirements. They can also be combined with other optical elements to achieve complex beam shaping functions.
Spectral Analysis:
During spectral analysis, plano-concave cylindrical lenses are used to adjust the divergence or convergence angle of the beam to meet different measurement needs.
Optical lenses are essential elements in many optical components, primarily used for imaging, focusing, collimating, and diffusing beams. They affect the wavefront curvature of light and can either converge or diverge light, producing real or virtual images. These lenses are widely used in high-tech fields such as security, digital cameras, high-power lasers, and optical instruments.
Bena Optics currently operates two machining systems: high-speed polishing and classic polishing. High-speed polishing is mainly used for batch commercial products, while classic polishing is employed for repairs, large sizes, specific material requirements, and other special circumstances. Additionally, classic polishing serves as a pretreatment for aspherical surface processing. This dual approach allows Bena Optics to meet diverse customer needs and maintain high-quality standards across various applications.
Key Features of Spherical Lens
A spherical lens has a uniform curvature across its surface, making it widely used in optical devices like telescopes, microscopes, and camera lenses. Key features include:
Uniform Light Refraction: Acts as a collection of infinite prisms, providing uniform convergence and divergence of light, enabling image formation.
Imaging Quality: Spherical lenses have spherical aberration, where light passing through the center and edges focuses at different points, limiting high-precision imaging applications.
Application Range: Due to low cost and simple manufacturing, spherical lenses are widely used in various optical devices, especially in low-cost consumer products.
Additionally, spherical lenses are uniquely applied in coupling between optical fibers, lasers, and detectors, and in collimating fiber beams in dense wavelength division multiplexing (DWDM) systems.
The Applications of Spherical Lens
Spherical lens is used for in various optical devices for focusing, collimating, or expanding light, and forming images. Their applications span metrology, microscopy, aerospace, medical technology, laser systems, and security.
laser optics windows are essential components used to separate different environments, such as the interior and exterior of an instrument, thereby protecting internal devices. These basic optical elements do not alter magnification but do influence the optical path. Key parameters for optical windows include light transmittance, surface accuracy, thickness, parallelism, and substrate material. Bena Optics provides high-precision windows made from various materials, including zinc selenide, germanium, silicon, barium fluoride, and calcium fluoride for infrared applications; fused silica and sapphire for spectral bands; and K9 glass for visible light. They maintain a large inventory of standard products and also offer custom optical windows tailored to specific needs.
Key Features of Optical Window
Optical windows possess high transmittance, hardness, erosion resistance, low thermal expansion, and minimal absorption loss, ensuring stable performance in various environments.
Made from materials like UV fused silica, quartz, infrared crystals, and optical glass, they offer excellent light transmission, high-temperature resistance, corrosion resistance, and electrical insulation. UV fused silica, for instance, has over 93% transmittance across the UV to IR spectrum.
Widely used in aerospace, laser systems, scientific research, and detectors, optical windows protect internal components and isolate external environments while maintaining high transmittance for specific wavelengths.
The Applications of Optical Window
Optical windows protect optical systems and sensitive electronics from external environments. Made of polished optical glass, they allow light transmission while isolating physical environments.
Overview of Silicon Lens
Silicon lenses are widely used in infrared applications, requiring optical elements with high thermal conductivity and low weight. Silicon plano-convex lenses are ideal for optical systems that collect, focus, or collimate light in near-infrared, short-wave infrared (SWIR), medium-wave infrared (MWIR), or long-wave infrared (LWIR) spectra.
Features of Silicon Lenses
Excellent Light Transmission:
Silicon lenses have high transmittance in the visible and near-infrared spectral ranges.
High Refractive Index:
Compared to other materials, silicon lenses have a higher refractive index, which can effectively reduce the thickness of the lens.
Low Dispersion:
Silicon lenses exhibit minimal dispersion effects, reducing light scattering and improving image quality.
Good Aberration Correction:
They can effectively eliminate aberrations, enhancing image clarity.
Superior Machinability:
Silicon lenses are easy to process, and the processed surfaces have high quality, with minimal risk of fogging.
The wedge prism can be used to individually deflect a laser beam by a certain angle or combined with another optical wedge prism for beam deviation purposes. A single prism can shift the incident beam by a specific angle. When two wedge prisms are used together, they can function as deformable prisms to correct the elliptical beam output of a laser tube or to deflect the beam at various angles within a 4�¸ range, where �¸ represents the deflection angle of a single prism. This beam shaping is achieved by independently rotating the two wedge prisms, making it ideal for beam scanning at different positions in imaging applications.
Features of Wedge Prism
The characteristics of wedge prisms include their very small apex angle (typically less than 1/10 radian), which results in minimal deflection of light as it passes through, regardless of the angle of incidence. In optical instruments, two wedge prisms are often combined and rotated relative to each other to produce different deflection angles or to convert the minimum deflection angle of light into the relative rotation angle of the two prisms. This setup is used to compensate for small angular deviations in the measurement of light. Such prisms find applications in many optical instruments, including military rangefinders and camera viewfinders.
Applications of Wedge Prisms
Laser Scanning: Wedge prisms can adjust the direction of the outgoing beam through rotation, making them commonly used in laser scanning devices.
Optical Pointing: In machine vision applications, wedge prisms are used to position the cameraâ??s field of view to the region of interest.
Beam Attenuation: By utilizing double Fresnel reflections, wedge prisms can attenuate high-power lasers while maintaining the beamâ??s polarization, size, and shape.
Beam Shaping and Translation: Wedge prisms can be used for beam shaping and translation, making them suitable for a variety of optical systems and applications.
