Achromatic Lenses
Achromatic lens are composite optical components formed by closely adhering multiple lenses with different optical properties together through optical adhesives. It is made up of two or more single lenses. For example, double-Achromatic lenses and triple-Achromatic lenses. The materials, radii of curvature and thicknesses of these single lenses are different. Common combinations include the bonding of positive and negative lenses to balance the focal length and aberration. By taking advantage of the different dispersion characteristics of the two types of glass, the color difference can be reduced. Meanwhile, the Achromatic lens is coated with a broadband anti-reflection film to reduce the reflection loss of light when it is reflected on the surface of the optical component, increase the light transmittance, and thereby improve the overall performance of the optical system.
Optical characteristics
Focal length adjustment characteristics
By choosing single lenses of different focal lengths for bonding, the overall focal length of the bonded lenses can be precisely adjusted. For instance, by gluing a positive lens with a short focal length and a negative lens with a long focal length, a Achromatic lens with a specific intermediate focal length can be obtained, meeting the requirements of different optical systems for imaging distance and magnification.
Aberration correction characteristics
Achromatic lenses perform well in aberration correction. Due to the differences in optical characteristics among different single lenses, various aberrations can be effectively compensated after gluing. For instance, in terms of axial chromatic aberration, different glasses have different refractive indices for light of different colors. By rationally combining positive and negative lenses, light of different colors can be focused on the same plane, reducing the color stripes at the edges of the image. Spherical aberration can also be improved by combining lenses of different curvatures, enabling the light to converge more evenly on the image plane and enhancing the imaging quality.
Improve optical performance
Achromatic lenses combine the advantages of multiple single lenses and can significantly improve the performance of optical systems. It can achieve higher resolution and a wider field of view while maintaining a smaller size and weight. In telescopes, it can enhance the observation effect of distant celestial bodies and obtain clearer and more detailed images.
CLZ Optical Co., Ltd. offers a catalog optical componments, Including catalog of Achromatic lenses made of various materials (such as optical glass, fused quartz, etc.) and in different specifications, as well as custom-processed Achromatic lenses based on customer drawings or specification requirements. Precise processing and coating treatment can be carried out according to customer needs.
Application fields and typical cases
Imaging system
In movie cameras, Achromatic lenses play a significant role. It can precisely converge the light onto the imaging plane. Whether it is a long shot or a close-up, it can form a clear image. The Achromatic lens can also control the depth of field. By adjusting the focal length, aperture and shooting distance, a shallow depth of field can be used to highlight the subject, or a large depth of field can be used to display the entire scene. In addition, the Achromatic lens works in conjunction with other components to correct aberrations and enhance the picture quality.
In a single-lens reflex lens, the Achromatic lens is responsible for collecting light and focusing it onto the image sensor to form a clear image. In zoom lenses, Achromatic lenses can meet different shooting requirements by changing the position of the internal single lens and cooperating with other lens groups to switch the focal length. Meanwhile, Achromatic lenses can correct aberrations and improve image quality.
