Anamorphotic Telescope Variable Curvature Aberration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional telescopic spectrometers with anamorphotic telescopes face challenges in achieving high spatial resolution and maintaining a large field of view, particularly at the edges of the field of vision, where spot size is poor and optical aberrations are significant.
Innovation Solution
The design incorporates an anamorphotic telescope with two reflector lenses having different radii of curvature in the directions of minimum and maximum magnification, with the second radius of curvature varying along the first direction to optimize spot size, and an aperture stop positioned between the lenses to reduce aberrations and ensure telecentricity, allowing for high spectral resolution and improved spot size over a wide field of view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If conventional telescopic spectrometers use anamorphotic telescopes with fixed radii of curvature, then the field of view can be enlarged, but spot size deteriorates at the edges of the field of vision
Solution Approach 1:
The patent applies the dynamics principle by making the radius of curvature of the reflector lenses variable rather than fixed. The radius of curvature changes dynamically across the lens surface (in the y-direction) to compensate for optical aberrations at different field positions. This allows the telescope to maintain high spatial resolution (small spot size) across the entire field of view, including at the edges, while still achieving an enlarged field of view through the anamorphotic design.
2Device complexity
If the number of lenses in a telescope is minimized to reduce weight, then device complexity is reduced, but achieving high spatial resolution becomes more difficult
Solution Approach 1:
The patent applies the parameter changes principle by modifying the radius of curvature parameter of the reflector lenses. Instead of using multiple lenses to achieve high spatial resolution, the invention changes the curvature parameter across the lens surface to correct optical aberrations. This allows a two-lens anamorphotic telescope to achieve high spatial resolution that would normally require more complex multi-lens systems, thereby reducing device complexity while maintaining performance.
3Manufacturing precision
If aperture stop is added to reduce optical aberrations, then spot size is improved, but device complexity increases
Solution Approach 1:
The patent applies the taking out principle by extracting the aberration correction function from a separate aperture stop component and integrating it into the reflector lenses themselves. By making the radius of curvature variable across the lens surface, the aberration correction is built into the lens design. This eliminates the need for an additional aperture stop component while still achieving the benefit of reduced optical aberrations and improved spot size, thereby avoiding increased device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration significantly reduces spot size and aberrations, enabling high spatial and spectral resolution across a large field of view, particularly when aligned with the direction of maximum or minimum magnification, and further enhances performance with variable curvature adjustments.
Implementation Method 1
a first and second reflector lens (10, 12), the first reflector lens (10) being oriented to direct light from a view direction of the telescope to the second reflector lens (12) at an angle to the view direction, the second reflector lens (12) being oriented to reflect light form the first reflector lens (10) to the image plane
Implementation Method 2
each of the first and second reflector lens (10, 12) comprising a reflective surface having a shape with mutually different first and second radii of curvature (Rx, Ry) in first and second directions (y, x) that optically correspond different ones of the directions of minimum and maximum magnification in the image plane respectively, wherein at least one of the first and second reflector lens has a variable radius of curvature in the second direction (x), which varies as a function of position in the first direction (y)
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
An anamorphotic telescope has mutually different magnification along directions of minimum and maximum magnification in an image plane. A spectroscope with an elongated input slit directed along one of the directions of maximum and minimum magnification may be located in the image plane. The anamorphotic telescope has a first and second reflector lens with mutually different first and second radii of curvature in directions (y, x) that optically correspond to directions of minimum and maximum magnification. At least one of the first and second reflector lens has a variable radius of curvature in one direction (x), which varies as a function of position in the other direction (y), the variable radius of curvature decreasing in a direction of the angle from the view direction to the light directed by the first reflector lens to the second reflector lens.