特徴

• By combining two lenses with different refractive index wavelength dispersion into a single lens, chromatic aberration and spherical aberration can be reduced compared to a single spherical lens.
• It can be used as a telescope objective lens or a collimating lens for laser experiments.
• Optimization by lens design results in little change in focal length across the visible range.
• Since not only chromatic aberration but also spherical aberration are well corrected, it is ideal as a collimating lens for laser.
• It is corrected not only for aberrations of the on-axis object point, but also for off-axis coma and astigmatism.
• It can be used for imaging systems such as telescope objective lenses and microscope imaging lenses.
• It can be selected according to your specifications from a wide range of variations, subdivided by outer diameter size and focal length.
• Air gap type condensing lens (NYTL/NYDL) for laser processing is also available.
• * Use an achromatic lens when you want to focus an image at infinity or when you want to use a point light source that is parallel to the image.
• Sufficient optical performance cannot be obtained when the camera is used for close-range imaging.
• * The chromatic lens has an orientation that allows parallel light to enter the lens.
• * This function allows parallel light to enter from the side of the face with a small radius of curvature (the face pointed to by the arrow).
• * When parallel light is incident from the opposite side, chromatic aberration and spherical aberration occur, and the condensing spot becomes larger.
• Chromatic aberration may increase when the camera is used at wavelengths other than visible light.
• * Also, transparency may be reduced.