An optical glass having a small partial dispersion ratio (g,F), while having a refractive index (n.sub.d) and Abbe number (.sub.d) within desired ranges, is obtained. The optical glass, in mass %, comprises 10.0 to 70.0% of an SiO.sub.2 component, 1.0 to 50.0% of an Nb.sub.2O.sub.5 component, and 1.0 to 30.0% of an Na.sub.2O component, and has a refractive index (n.sub.d) of 1.62 to 1.75, an Abbe number (.sub.d) of 30 to 42, and a partial dispersion ratio (g,F) of no greater than 0.594.

To provide an optical system that achieves a reduction in weight while correcting various aberrations, such as chromatic aberration, with appropriate use of a glass material for lenses forming respective lens groups. Provided is an optical system characterized in that an object-side lens group GF and an image-side lens group GR are arranged in order from an object side, and the optical system includes a lens LA that satisfies a predetermined conditional expression.

A spectrally shearing optical relay system, said relay system being comprised of two halves disposed symmetrically about an aperture stop S, wherein each half comprises a plurality of rotationally symmetric optical elements forming an objective and a com-pound prism comprised of a plurality of dispersing prisms. The compound prisms are located between the objectives and the aperture stop. An imaging device with such an optical relay system is also proposed.

The present disclosure is directed to systems and methods useful for providing a metasurface lens formed by a plurality of multi-piece optical structures disposed on, about, or across at least a portion of the surface of substrate member. Each of the plurality of multi-piece optical structures includes a solid cylindrical core structure surrounded by a hollow cylindrical core structure such that a gap having a defined width forms between the solid cylindrical core structure and the hollow cylindrical structure surrounding the solid core. The width of the gap determines the optical performance of the metasurface lens. The multi-component optical structures forming the metasurface lens advantageously produce little or no phase shift in the electromagnetic energy passing through the metasurface lens, thereby beneficially providing an optical device having minimal or no dispersion and/or chromatic aberration.

In general, techniques are described regarding a combined monochrome and chromatic camera sensor. A camera comprising a camera sensor and a processor may be configured to perform the techniques. The camera sensor may include pixel sensors, monochrome filters disposed over a first subset of the pixel sensors, and color filters disposed over a second subset of the pixel sensors. The first subset of the pixel sensors may be configured to capture a monochrome image of a scene. The second subset of the pixel sensors may be configured to capture, concurrently with the capture of the monochrome image, a color image of the scene, where a number of the first subset of the pixel sensors is greater than a number of the second subset of the pixel sensors. The processor may be configured to process the monochrome image and the color image to obtain an enhanced color image of the scene.

An optical glass having a small partial dispersion ratio (g,F), while having a refractive index (n.sub.d) and Abbe number (.sub.d) within desired ranges, is obtained. The optical glass, in mass %, comprises 10.0 to 70.0% of an SiO.sub.2 component, 1.0 to 50.0% of an Nb.sub.2O.sub.5 component, and 1.0 to 30.0% of an Na.sub.2O component, and has a refractive index (n.sub.d) of 1.62 to 1.75, an Abbe number (.sub.d) of 30 to 42, and a partial dispersion ratio (g,F) of no greater than 0.594.

Systems and methods for dispersing an optical beam are disclosed. In one implementation, an optical system includes a first double Amici prism and a second double Amici prism. The first and second double Amici prisms are aligned along an optical axis of the system and configured to transmit the optical beam. At least one of the first and second double Amici prisms is rotatable relative to the other around the optical axis. Advantageously, the disclosed systems and methods allow for efficient and versatile adjustment of the magnitude and/or orientation of the dispersion of the optical beam.

The present disclosure provides an adaptive optics system including at least one active pixel sensor array that detects light and sends a signal to a processor. The adaptive optics system also includes a wavefront correction system including at least one wavefront control structure and the processor, and that executes instructions on the processor to produce a digital image in which at least one wavefront distortion in the light detected by the active pixel sensor array is partially or fully corrected. The disclosure also provides methods of using the adaptive optics system.

A mid-infrared objective lens assembly (10) includes a plurality of spaced apart, refractive lens elements (20) that operate in the mid-infrared spectral range, the plurality of lens elements (20) including an aplanatic first lens element (26) that is closest to an object (14) to be observed. The first lens element (26) has a forward surface (36) that faces the object (14) and a rearward surface (38) that faces away from the object (14). The forward surface (36) can have a radius of curvature that is negative.

The present disclosure provides an adaptive optics system including at least one active pixel sensor array that detects light and sends a signal to a processor. The adaptive optics system also includes a wavefront correction system including at least one wavefront control structure and the processor, and that executes instructions on the processor to produce a digital image in which at least one wavefront distortion in the light detected by the active pixel sensor array is partially or fully corrected. The disclosure also provides methods of using the adaptive optics system.