Lenses

An aspheric lens is a special optical component with continuously varying surface curvature. Its design breaks through the limitation of constant curvature of traditional spherical lenses. By precisely controlling the radius of curvature of each area of the lens, near-axis and far-axis light can be focused at the same point, thereby effectively eliminating optical distortions such as spherical aberration and coma.

A convex lens is a converging optical element that is thicker at the center and thinner at the edges. It can focus parallel light to a focal point or converge diverging light to form an image. Convex lenses are one of the most basic and widely used optical elements, characterized by their simple structure, intuitive imaging, and wide applicability across a wide wavelength range. They are often used as core components in imaging, focusing, and beam shaping systems.

A concave lens is a diverging optical element that is thinner at the center and thicker at the edges. It can cause parallel or converging light to diverge, forming a virtual image or adjusting the divergence angle of a beam. Concave lenses are often used to control optical paths, correct aberrations, or are used in combination with convex lenses, playing an important role in various imaging and beam shaping systems.

A cylindrical lens is an optical element with curvature in only a single direction, focusing or diverging light along only one axis. It can convert a point source or circular beam into a linear spot, or control the optical behavior in the horizontal and vertical directions separately. Cylindrical lenses are commonly used in asymmetric beam shaping and one-dimensional imaging systems.

An infrared lens is an optical element designed specifically for the infrared band (near-infrared NIR, mid-infrared MWIR, and far-infrared LWIR). It is typically made of infrared materials such as germanium (Ge), silicon (Si), zinc selenide (ZnSe), and zinc sulfide (ZnS). It features high transmittance, low absorption, and good environmental stability in the infrared band, enabling the focusing, imaging, and beam control of infrared light.

A crescent (moon-shaped) lens is an optical lens with an asymmetrical, crescent-shaped profile. It typically consists of one or two curved surfaces with different curvatures, giving it an overall crescent shape. This structure is commonly used in off-axis or space-constrained optical systems, enabling light deflection, convergence, or aberration correction without obstructing the main optical path, thus improving system integration and design flexibility.

Bonded (cemented) lenses are composite lenses formed by bonding two or more lenses together using optical adhesives (such as UV adhesive or epoxy adhesive). Cementing effectively corrects chromatic aberration and other aberrations while reducing the number of lenses, resulting in a more compact and stable optical system. Cemented lenses are widely used in high-precision imaging and complex optical path designs.

A spherical lens is an optical lens with a spherical surface. It is the most common type of lens, including convex and concave spherical lenses. It can focus or diverge light to form real or virtual images. With its simple structure and mature manufacturing process, it is the most basic and widely used lens type in optical systems.

A microlens array is an optical component composed of a large number of tiny lens units, each typically ranging from a few micrometers to hundreds of micrometers in size, arranged either regularly or randomly. Microlens arrays can precisely split, focus, or shape incident light, improving light collection efficiency or achieving specific optical functions. They are widely used in imaging, illumination, and optical sensing.

Laser lenses are a type of optical lens specifically designed for laser systems to control the focusing, collimation, beam expansion, or shaping of laser beams. Compared to ordinary lenses, laser lenses typically have high transmittance and low absorption characteristics for laser wavelengths, can withstand high power densities, and ensure beam quality and stability.

A relay mirror is a reflective element used in optical systems to transfer a light beam from one optical path to another while maintaining the beam's direction, focal point, or image plane position. Relay mirrors are commonly used in complex optical paths to extend optical path lengths, deflect light rays, or rearrange optical paths within limited space without altering image quality.