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N-BK7 SF11 Optical Glass Achromatic Doublet for High-Resolution Photography
Material
Composition: The N-BK7/SF11 Achromatic Doublet is composed of two types of optical glass: N-BK7 and SF11.
N-BK7: A type of borosilicate crown glass with high transmittance in the visible and near-infrared spectrum.
SF11: A type of flint glass known for its ability to correct chromatic aberrations in combination with crown glass.
Property
Refractive Index: Each glass type has a distinct refractive index, which allows for the dispersion of light to be managed and corrected.
N-BK7: Typically has a refractive index of around 1.516 at 587.6 nm.
SF11: Typically has a higher refractive index compared to N-BK7, aiding in the correction of chromatic aberrations.
Dispersion: The combination of N-BK7 and SF11 glasses is specifically chosen to minimize dispersion, ensuring that light of different colors focuses to a common point.
Durability: Both glasses are resistant to thermal shock and chemical attack, ensuring longevity and stability in various environments.
Function
Achromatic Correction: The doublet design utilizes the different refractive indices and dispersions of N-BK7 and SF11 glasses to correct for chromatic aberrations. This results in images that are free from color fringes and have high color fidelity.
High Resolution: The precise manufacturing and optical properties of the doublet enable it to produce high-resolution images with sharp detail and clarity.
Focal Length and Aperture: The doublet can be designed with various focal lengths and apertures to suit different photographic needs, from wide-angle to telephoto applications.
Application
High-Resolution Photography: Ideal for use in professional photography where high resolution and color accuracy are critical, such as portrait photography, landscape photography, and scientific imaging.
Telescopes and Binoculars: The achromatic doublet can be used in telescopes and binoculars to produce clear, high-contrast images with minimal chromatic aberration.
Machine Vision and Imaging Systems: Suitable for machine vision and imaging systems that require precise color rendition and high spatial resolution.
**Introduction**
Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted par... **Introduction**
Shanghai Longway Special Glass Co., Ltd. has been a professional supplier in the glass industry for over 20 years. With its expertise spanning across various fields, including optics, laser, imaging, and lighting etc., the company has established itself as a trusted par...
