A discrete zooms optimization based on the genetic algorithm (GA) is presented in this paper, which applies liquid
elements and irregular lenses group moving to realize the best resolution for all distinct zooms without any mechanism
moving limit. By using GA optimization for discrete zooms lens, the liquid element curvatures and irregular lenses
group locations can be effectively looked for, resulting in better performance than that of traditional zoom lens with
continuous lens group moving. The simulation results show that the discrete zooms lens with GA optimization gives a
better choice than the traditional zoom lens designed by damped least square (DLS).
This paper proposes a new zoom lens design with intermediate image. The two 3x zoom lenses are independently
designed and then cascaded to a 9x zoom lens. The concept of intermediate optics is applied in this paper in order to
minimize size of front diameter and overall length. The final layout shows the proposed 9x zoom lens can effectively
miniature the front diameter of lens about 44.25%.
An optical design of 2X optical miniature zoom lens with liquid lens elements and optimization method: discrete lens groups shifts (DLGS) has been presented in this research. Two liquid elements are applied to minimize the overall length of zoom optics. Moreover, a compensative optimization method with assistance of Genetic Algorism is introduced in this research with a new concept of DLGS, which not only solve the complicated problem of liquid optics itself but also improve the performance of optics. Genetic algorithms (GA) written in CODE V plays the role at finding out the appropriate parameters such as curvatures, thicknesses, glass materials and etc. Besides, one table with great lens groups shifts by GA would be created to move the lens groups on the optimal positions of different zooms. As a result, the DLGS optimization method associated with the GA optimization improve the zoom lens performance averagely 40% better than traditional ones.
The research focuses on prospect module of LED projector with high contrast and high efficiency. This is a
completely new design which takes advantage of less heat interference and compactness. Simulation shows that light
efficnecy of this design might be up to 46% .In addition, the liquid optics design is transformers although 720:1 for
dimming plus current 2000:1. It sounds great to hear 150000:1.
A new optical design inclusive of Blue-Ray Pickup head system and liquid crystal optics is proposed in this paper. With
electrode pattern and the differential biased circuit, the gradient of the electric field distribution inside the liquid crystal
sample cell are able to vary through the adjustment of driving voltage. Optical power of liquid crystal lens can be
determined by changing the polarity of gradient within the sample cell which posses the homogeneous alignment, then
deliver convergence or divergence of specific light beams. This design is capable of correcting aberrations fast with
liquid crystal optics scheme when any misalignment errors occur. According to specification from Blue-ray Disc White
paper, there are several kinds of pick up head system with LC liquid optics are designed and discussed in this paper.
Different tolerance such as de-focus, tilt, de-center and their related compensation are further analyzed in this research.
The simulation results show that optical design using liquid crystal optics with aperture stop setup as a compensation
device can eliminate up to 46% compared to traditional ones.
This study used the aspheric lens to realize the laser flat-top optimization, and
applied the genetic algorithm (GA) to find the optimal results. Using the
characteristics of aspheric lens to obtain the optimized high quality Nd: YAG 355
waveband laser flat-top optical system, this study employed the Light tools LDS (least
damped square) and the GA of artificial intelligence optimization method to
determine the optimal aspheric coefficient and obtain the optimal solution.
This study applied the aspheric lens with GA for the flattening of laser beams
using two aspheric lenses in the aspheric surface optical system to complete 80% spot
narrowing under standard deviation of 0.6142.
A new optical design inclusive of zoom optics and optical engine system is proposed in this paper. Traditionally, there is
trade-off between F-number of projection optics and contrast, which seems that super high-contrast image from
commercial projector was simply a dream. Some ideas of adaptive optics were announced before for the improvement of
high contrast. However, few reach success or cost will be high. Traditionally, there is nothing to do with optics of
projector and optical engine of projector if lens meets the specification. In this paper, a new optical design for optics and
optical engine is studied with liquid optics arrays. Thanks to advanced optical design and LED light luminance,
simulation results show that 50% improvement for image contrast could be made without sacrifice of volumetric size.
This paper propose an optical design of adaptive automotive headlight system with advanced light-emitting diodes
(LEDs) and digital micro-mirror device (DMD). In recent days, safety of on-road drive plays the role at automotive
industries so that fast response of adaptive automotive headlight system becomes a critical issue especially in mountain
road drive. In order to integrate the function of low and high beam into a single headlight without sacrifice of volumetric
size of whole system, a DMD is employed in this optical design. Simulation shows that new optical design not only
promotes light efficiency but also reduce volumetric size. Besides, light from adaptive automotive headlight system
could make the projected light much suitable for drivers according to individual driver's vision experience. Results show
that volumetric size of all system might be reduced up to 30 percent but light efficiency could be promoted up to 20 percent.
LED play the role at such the kind of modern display light source thanks to its power consumption and the most
important, outstanding colour gamut. Modern displays are required to be much thinner and thinner with best colour
gamut. We have manipulated the pattern distribution of the micro features to obtain the required optical characteristics.
A light guide plate (LGP) of 3.5 inch dimension using an LED light source is used as an example for the study of
integrated LGPs. This research designs a piece of light guide film (LGF) at the back of LGP. It may induct the exterior
light, and enables the backlight module to achieve the energy conservation. In addition, the special-designed light pipe
and freeform optics will induce external light, which will contribute 15% power savings.
This paper proposes a new method for optimization optics with a diffractive optical element (DOE) via a Hybrid
Taguchi Genetic Algorithm. A Diffractive Optical Element, based the theory of wave phase difference, takes advantage
of the negative Abbe number which might significantly eliminate the axial chromatic aberrations of optics. Following
the advanced technology applied to the micro lens and etching process, precisely-made micro DOEs can now be
manufactured in large numbers. However, traditional least damping square has its limitations for the optimization of
axial and chromatic aberrations with DOE. In this research, we adopted the genetic algorithm (GA) and incorporated the
steady Taguchi method into GA. Combining the two methods produced a new hybrid Taguchi-genetic algorithm
(HTGA). Suitable glass combinations and DOE positions were selected to minimize both axial and lateral chromatic
aberration in the optical system. This new method carries out the task of eliminating both axial and lateral chromatic
aberration, unlike DOE optimization by LDS, which works for axial aberration only and with less efficiency. Experiments show that the surface position of the DOE could be determined first; in addition, regardless of whether chromatic aberration was axial or longitudinal, issues concerning the optical lens's chromatic aberration could be significantly reduced, compared to results from the traditional least damping square (LDS) method.
This paper studies the effects of improving overall optical image quality via Digital Image Processing (DIP) and
compares the promoted optical image with the non-processed optical image. Seen from the optical system, the
improvement of image quality has a great influence on chromatic aberration and monochromatic aberration. However,
overall image capture systems-such as cellphones and digital
cameras-include not only the basic optical system but
also many other factors, such as the electronic circuit system, transducer system, and so forth, whose quality can
directly affect the image quality of the whole picture. Therefore, in this thesis Digital Image Processing technology is
utilized to improve the overall image. It is shown via experiments that system modulation transfer function (MTF)
based on the proposed DIP technology and applied to a comparatively bad optical system can be comparable to, even
possibly superior to, the system MTF derived from a good optical system.
This research proposed a new method HTGA (Hybrid Taguchi Genetic Algorithm) for extended optimization of 350X
zoom optics with DOE (Diffractive Optical Element) in order to eliminate chromatic aberration efficiently. Thanks to
negative Abbe number of DOE, the optimal eliminating chromatic aberration could optimized and minimized with DOE
coefficient and glass material. Following the advanced technology applied to micro lens and etching process,
precisely-made micro DOE element now is possible to be manufactured in a large number. The steady Taguchi method
incorporated with the genetic algorithm (GA), called hybrid Taguchi-genetic algorithm (HTGA), proposed in this
research, have reached success in determining the best position for DOE plane and conclusively eliminate the chromatic
aberration of 350 Zoom optics with DOE element and various glass materials.
This research proposes a new method of optical system optimization for both optics and image processing, as a
route to achieving best performance. Traditionally, optics is optimized independently without taking account of image
processing. In this research, optimization work will be further studied with the concept of digital image processing (DIP),
point spread function (PSF) and modulation transfer function (MTF), in order to reduce the size of miniature zoom
lenses without sacrificing image quality. Experimental results show that optimization taking account of image processing
yields much better performance than optimization which ignores it. From another point of view, it is concluded that
equivalent performance may be achieved in the following two cases: one is having a poor lens with optimization work
combined with image processing; the other is good optics without optimization work combined with image processing.
This research proposes a new method for skin diagnose using near infrared as the light source (750nm~1300nm).
Compared to UV and visible light, near infrared might penetrate relatively deep into biological soft tissue in some cases
although NIR absorption property of tissue is not a constant for water, fat, and collagen etc. In the research, NIR
absorption and scattering properties for skin are discussed firstly using the theory of molecule vibration from Quantum
physics and Solid State Physics; secondly the practical model for various NIR absorption spectrum to skin tissue are
done by optical simulation for human skin. Finally, experiments are done for further identification of proposed model for
human skin and its reaction to near infrared. Results show success with identification from both theory and experiments.
This research proposes a newly developed method to high zoom lens for mobile phone use, which the
overall length is restricted in mobile phone size acceptable. Generally speaking, the optical design with liquid
lens might be more complicated in optimization than traditional optics; not only because aspherical coefficient
in liquid lens element is difficult to be defined and measured, but also because efficient optics layout needs
more efforts to study in the near future. The paper mainly utilizes liquid lens in order to short total length; two
liquid lens elements must be included. Besides consider total length, Lateral aberration also is very important.
Lateral aberration will play a significant role in the Modulation Transfer function (MTF), so, the optical design
will be able to arise very big, and that the many kinds of chromatics aberration with two groups of liquid lens. Using
Digital Signal Processing technology principal factor why this also is.