Abstract: This study aimed to establish the coordinate transformation between the off-axis
aspherics coordinate system σ and the axial symmetry aspherics coordinate system σ by
transforming coordinates and present the computation models of asphericity in rectangular
coordinate system and cylindrical coordinate system respectively. The asphericity expressions in
both coordinate systems were applicable to the comparative sphere calculation of Off-axis aspherics
with different figures. We selected an Initiation sphere in view of technology, along with equations
in a right coordinate system for certain caliber and structure. Then, by numerical computation, we
selected the best fitting sphere and simplifed the complex models by choosing a right coordinate
system. At last, the solution for asphericity and the best fitting sphere curvature radius of off-axis
aspherics were introduced by examples.
Abstract: This paper presents a high-precision, non-destructive measurement system for
determining the thickness and refractive indices of birefringent optical wave plates. Significantly,
the proposed method enables the two refractive indices of the optical sample to be measured
simultaneously. The performance of the proposed system is verified using a commercial quartz
optical wave plate with known refractive indices of 1.5518 e n = and 1.5427 o n = , respectively, and
a thickness of 452.1428 μm. The experimentally determined values of the refractive indices are
found to be 1.55190 e n = and 1.54281 o n = , respectively, while the thickness is found to be 452.189
μm, corresponding to an experimental error of approximately 0.046 μm. The measurement
resolution of the proposed system exceeds that of the interferometer hardware itself and provides a
simple yet highly accurate means of measuring the principal optical parameters of birefringent glass
Abstract: With differential confocal pointing method, the ultra-precise machined surface can be
measured with high resolution. In this technology, the differential confocal pointing signal, the zero
point of the output diagram, may be affected by the different response of the two detectors, the
different defocus of the two detectors, the accordance of the two pinholes in front of the detectors
and so on. The paper aims at discussing the effect of these elements on the measuring signal.
Through theoretical analysis of the output of the differential confocal microscopy (DCM), the
conclusion that the pointing signal keeps fixed after the differential confocal system has been set up,
does not change with the differences mentioned above, is presented. However, the resolution of the
differential confocal system is concerned with the response performance and defocus of the two
detectors. This is also confirmed by experiments.
Abstract: The scanning system which uses the non-linear focusing lens is usually accompanied by a
major problem that is a non-constant scanning velocity of the spots in the projection plane.
Moreover, the energy of the spots and the shape of the drilling holes would be affected. Hence, the
focal lens of the scanning system usually uses the f-theta lens to solve this problem. This paper
proposes a method utilizing the ZEMAX to analyze the commercial F-theta lens. The results
indicate the F-theta lens can increase the quality of the drilling holes and amend the projection
plane. In order to verify the analysis results, each diameter of an array holes drilled by the CO2 laser
drilling machine would be measured. The experimental results can demonstrate that the percentage
of the variation in the diameter of holes is close to the simulation results. Therefore, the method can
effectively analyze the F-theta lens of the scanning systems.
Abstract: With an aim to achieve a breakthrough the choke point in research on system design, to
achieve the transforming in multiple fields of view, the approaching to system efficacy limit in
theory and improving smartness, pure diffractive optical system is chosen. The top idea and main
strategy is developed. Some correlative model is established. In optimized design, global
optimization algorithm is used to achieve wider spectrum range, multi field view, lower distortion
and appropriate MTF. A kind of result works mainly in 3~5%m and 8~12%m with high ratio of more
than 20:1 is evaluated. And this integrated multi-sensor electro-optical system satisfies the applied
requirements o some criteria, such as Modulation Transfer Function (MTF), Spot Diagram (RMS)
and Point Spread Function (PSF) etc., and achieves remarkable advantages in volume, weight,
system efficiency and so on.
Abstract: For the 1:1 laser projection lithography system used to achieve large-area patterning with
higher resolutions as well as higher throughput, the key parameters such as the laser beam
geometry, the numerical aperture of projection lens, the laser source power and the pulse repetition
rate are theoretically analyzed. It is expounded the process of uniform exposure in hexagonal beam
shape, the advantages and limitations of 1:1 projection owing to numerical apertures deciding the
resolution, as well as the cause of choosing larger laser power and pulse repetition rate. Meanwhile,
the projection lens for a unit-magnification, refractive imaging system is tentatively simulationdesigned
using ZEMAX optical design software. The optimized three-dimensional layout is plotted.
For the designed results, the maximum optical path difference is smaller thanλ /4 within entire
visual field. The resolution for feature sizes 10μm can be achieved within depth of focus 400μm by
evaluating MTF. The maximum field curvature is within 10μm and the maximum distortion is small
than 0.000007%. This fulfills the demands in technical specifications.
Abstract: Dynamic optical is a theory which we can deduce the object-image conjugated rations of
optical system by researching motion group in optical system. It can unify various formula and
methods of optical system which have motion group. Zoom system is a typical dynamic optical
system. This paper will discuss how to apply the dynamic optical theory to zoom system design.
With dynamic optical theory, we can derive the image motion compensating formula and the trace
curve of the image motion compensating group. The cam can be fabricated according to
compensating curve, which can ensure the stabilization of image plane and keep imaging quality.
Moreover, a example of 30× zoom system is presented, which proves that the dynamic optical
theory has some practicability for zoom system design.
Abstract: The formation of tool marks in single-point diamond turning is a fundamental study of
the effect of materials swelling and recovery on surface roughness on a machined surface. A series
of orthogonal face cutting tests has been conducted among plate aluminum alloy, oxygen-free high
conductivity copper and electroless nickel phosphorus under the same cutting conditions by the use
of facet tools with different front clearance angles. The results show that the regular width of the
undulating pattern in tool marks could be explained by side swelling and the micro-waviness within
a tool mark is caused by burnishing and recovery.
Abstract: In this paper, we are presenting a design method and its results for a space optical system
with high resolution and wide field of view. This optical system can be used both in infrared and
visible configurations. The designing of this system is based on an on-axis three-mirror
anastigmatic (TMA) system. Here the on-axis concept allows wide field of view (FOV) enabling a
diversity of designs available for the Multi-Object Spectrometer instruments optimized for low
scattered and low emissive light. The available FOVs are upto 1º in both spectrum ranges, whereas
the available aperture range is F/15 - F/10. The final optical system is a three-mirror telescope with
two on-axis and one off-axis segment and its resolution is 0.3m or even lower. The distinguished
feature of this design is that it maintains diffraction-limited image at wide wavelengths. The
technological developments in the field of computer generated shaping of large-sized optical
surface details with diffraction-limited imagery have opened new avenues towards the designing
techniques. Such techniques permit us to expand these technological opportunities to fabricate the
aspherical off-axis mirrors for a complex configuration.