1. Convex lens
Product description
A convex lens is a type of lens whose middle part is thicker than the edge, so when light passes through it, it refracts and focuses to a point, which is called the focal point. Convex lenses are often used to magnify objects, focus light, or form real images.
Specifications
Material: Common convex lens materials include optical glass (such as K9 glass), optical grade PMMA (polymethyl methacrylate, also known as acrylic), etc.
Dimensions: Depending on the application requirements, the size of a convex lens can range from a few millimeters to hundreds of millimeters.
Focal length: Focal length is an important parameter of a convex lens, which determines the position where the light is focused. The longer the focal length, the farther the point where the light is focused; the shorter the focal length, the closer the point where the light is focused. The specific value of the focal length depends on the material, shape, and size of the lens.
Transmittance: Transmittance refers to the proportion of light that is transmitted after passing through the lens. High-quality convex lenses usually have a transmittance of more than 90%.
2. Concave lens
Product description
A concave lens is the opposite of a convex lens, and its middle part is thinner than the edge. Therefore, when light passes through a concave lens, it diverges instead of focusing. Concave lenses are often used to correct myopia, expand the field of vision, or form virtual images.
Specifications
Material: The materials of concave lenses also include optical glass (such as K9 glass), quartz, etc.
Dimensions: The size of a concave lens also depends on the application requirements and can range from a few millimeters to hundreds of millimeters.
Focal length: The focal length of a concave lens is also one of its important parameters, which determines the degree of light divergence. The longer the focal length, the slower the light diverges; the shorter the focal length, the faster the light diverges.
Coating: In order to improve the transmittance and anti-reflection performance of a concave lens, one or more layers of thin film are usually coated on its surface.
3. Glued lens
Product description
Glued lenses are made of two or more lenses with different refractive indices glued together by a special process. This design can eliminate the chromatic aberration and aberration produced by a single lens, thereby improving the image quality. Glued lenses are often used in high-precision imaging systems, telescopes, microscopes and other fields.
Specifications
Material: The materials of cemented lenses usually include crown glass and flint glass, etc. The refractive index and dispersion characteristics of these two glasses are different, and they can compensate each other through cementation.
Structure: Cemented lenses can be double cemented (two lenses cemented), triple cemented (three lenses cemented) and other multi-cemented structures.
Focal length: The focal length of a cemented lens depends on its structure and material, which is usually more complex than a single lens.
Light transmittance: High-quality cemented lenses have excellent light transmittance and anti-reflection properties.
4. Edged lenses
Product description
Edged lenses refer to lenses that have been specially cut and edged. This treatment can change the shape and size of the lens to meet specific application requirements. Edged lenses are often used in lighting systems, optical instruments and other fields.
Specifications
Material: The materials of edged lenses also include optical glass, quartz, etc.
Shape: The shape of the edged lens can be customized according to application requirements, such as square, rectangular, round, etc.
Size: The size of the cut-edge lens also depends on the application requirements and can range from a few millimeters to hundreds of millimeters.
Transmittance: High-quality cut-edge lenses have excellent transmittance and anti-reflection properties.
5. Shaped Lenses
Product Description
Shaped lenses refer to lenses with irregular shapes. The design of this lens can be customized according to specific application requirements to achieve specific optical effects. Shaped lenses are often used in special optical systems, lasers and other fields.
Specifications
Material: The materials of shaped lenses also include optical glass, quartz, etc.
Shape: The shape of shaped lenses can be customized according to application requirements, such as conical, parabolic, hyperbolic, etc.
Size: The size of shaped lenses also depends on application requirements and can range from a few millimeters to hundreds of millimeters.
Precision: The processing accuracy of shaped lenses is crucial to their performance. High-quality shaped lenses need to have precise size and shape tolerances to ensure the stability and consistency of their optical performance.
