scholarly journals Design method for assembly-insensitive freeform reflective optical systems

2018 ◽  
Vol 26 (21) ◽  
pp. 27798 ◽  
Author(s):  
Xinyu Liu ◽  
Tongtong Gong ◽  
Guofan Jin ◽  
Jun Zhu
Keyword(s):  
Design Method ◽  
Optical Systems

scholarly journals Nano-imprinted subwavelength gratings as polarizing beamsplitters

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Julian Wüster ◽  
Yannick Bourgin ◽  
Patrick Feßer ◽  
Arne Behrens ◽  
Stefan Sinzinger
Keyword(s):  
Nanoimprint Lithography ◽  
Optical Measurement ◽  
Design Method ◽  
Optical Systems ◽  
Surface Metrology ◽  
Measurement Systems ◽  
Common Path ◽  
Dielectric Coatings ◽  
Subwavelength Gratings ◽  
Wide Range

AbstractPolarizing beamsplitters have numerous applications in optical systems, such as systems for freeform surface metrology. They are classically manufactured from birefringent materials or with stacks of dielectric coatings. We present a binary subwavelength-structured form-birefringent diffraction grating, which acts as a polarizing beamsplitter for a wide range of incidence angles −30∘…+30∘. We refine the general design method for such hybrid gratings. We furthermore demonstrate the manufacturing steps with Soft-UV-Nanoimprint-Lithography, as well as the experimental verification, that the structure reliably acts as a polarizing beamsplitter. The experimental results show a contrast in efficiency for TE- and TM-polarization of up to 1:18 in the first order, and 34:1 in the zeroth order. The grating potentially enables us to realize integrated compact optical measurement systems, such as common-path interferometers.

New design method for athermalized optical systems

1992 ◽  
Author(s):  
Yasuhisa Tamagawa ◽  
Satoshi Wakabayashi ◽  
Toru Tajime
Keyword(s):  
Design Method ◽  
Optical Systems

An efficient design method for LED surface sources in three-dimensional rotational geometry using projected angle difference  An efficient design method for LED surface sources

2018 ◽  
Vol 51 (3) ◽  
pp. 457-464 ◽  
Author(s):  
X Li ◽  
P Ge ◽  
H Wang
Keyword(s):  
Design Method ◽  
Near Field ◽  
Three Dimensional ◽  
Optical Systems ◽  
Two Dimensional ◽  
Efficient Design ◽  
Angle Difference ◽  
Extended Sources ◽  
The Relationship ◽  
Better Than

An efficient method is proposed for the design of prescribed rotational illumination on the far or near field using the edge-ray principle. By this method, the prescribed illuminance on the prescribed location can be determined by projected angle difference in a two-dimensional design process for LED extended sources. Profiles of the lens with two initial curves on the centre can be calculated based on the relationship between the illuminance and the projected angle difference. The initial optical systems we calculated are close to the prescribed illumination despite the influence of skew rays. More importantly, a prescribed illumination on the near field can be achieved accurately and quickly by using this method, which is better than the usual luminous intensity distribution design methods for LED extended sources.

scholarly journals A Design for a Manufacturing-Constrained Off-Axis Four-Mirror Reflective System

2020 ◽  
Vol 10 (15) ◽  
pp. 5387
Author(s):  
Ruoxin Liu ◽  
Zexiao Li ◽  
Yiting Duan ◽  
Fengzhou Fang
Keyword(s):  
Design Method ◽  
Optical Systems ◽  
Initial Structure ◽  
Manufacturing Constraints ◽  
Structural Configuration ◽  
Entrance Pupil ◽  
Good Imaging ◽  
Ultra Precision ◽  
Reflective Systems ◽  
Entrance Pupil Diameter

Off-axis reflective optical systems find wide applications in various industries, but the related manufacturing issues have not been well considered in the design process. This paper proposed a design method for cylindrical reflective systems considering manufacturing constraints to facilitate ultra-precision raster milling. An appropriate index to evaluate manufacturing constraints is established. The optimization solution is implemented for the objective function composed of primary aberration coefficients with weights and constraint conditions of the structural configuration by introducing the genetic algorithm. The four-mirror initial structure with a good imaging quality and a special structural configuration is then obtained. The method’s feasibility is validated by designing an off-axis four-mirror afocal system with an entrance pupil diameter of 170 mm, a field of view of 3° × 3° and a compression ratio of five times. All mirrors in the system are designed to be distributed along a cylinder.

scholarly journals Design method for freeform optical systems containing diffraction gratings

2018 ◽  
Vol 26 (16) ◽  
pp. 20792 ◽  
Author(s):  
Benqi Zhang ◽  
Guofan Jin ◽  
Jun Zhu
Keyword(s):  
Design Method ◽  
Diffraction Gratings ◽  
Optical Systems
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