This paper combines the research of laboratory topics, through reading a large number of related literatures, and tracking the latest technology of interferometer companies at home and abroad, analyzing and contrasting the two mainstream optical path modes of interferometer: Twyman Green and Fizeau Optical Road. To sum up their pros and cons; at present, the focus of research is on how to improve the contrast of stripes and eliminate environmental interference. In view of how to improve the contrast of stripes, scholars have proposed to introduce lasers to replace the original light sources with poor monochromatic properties such as sodium and silver lamps. Because of the strong coherence of laser time and space, related technologies such as polarization coherence and frosted glass screens have been Use, greatly reduce the influence of stray light and overlapping stripes, improve the contrast of stripes; the influence of environmental factors is inherent and the size is uncertain, the dynamic interferometer comes into being, that is, the requirements of anti-vibration technology, corresponding to the interference of different detection caliber Instrument, there are different anti-vibration technology applications, but the overall is divided into passive antivibration technology and active anti-vibration technology.
An ultra-high resolution space target detector is essential for the exploration of the outer space of the Earth. The development of high-resolution space target detection system has become the key. All the indicators of the lens designed by ZEMAX can meet the design requirements and meet the imaging quality. However, whether the actual image quality of the assembled machine can meet the image quality requirements of the design often depends on the eccentricity level of the later adjustment, and the eccentricity affects the consistency of the optical axis, resulting in an asymmetrical aberration of the off-axis field of view. The image quality is degraded. However, when the optical system is eccentrically adjusted, the eccentricity of the system needs to be reflected by the underlying lens and amplified continuously, which is not conducive to the analysis of the system eccentricity error. A reasonable set of adjustment methods can improve the overall performance of the ultra-high resolution optical system. During the assembly of the lens group, the center deviation of each mirror surface above the mirror surface will affect the center deviation measurement difference of the mirror surface to be tested. In this paper, based on the reflection center deviation detector, the lens assembly eccentricity model is established, and the vertical axis magnification of the optical system composed of all the mirrors above the mirror surface and the optical system imaging of all the mirror surfaces above the mirror surface are analyzed. After the ball. According to the lens assembly eccentricity model theory, the existing high-resolution spaceborne camera is used to carry out the adjustment analysis, and the adjusted system eccentricity error meets the design requirements, and the MTF at the 110 pm/mm field after the adjustment is measured. The value is 0.35, and the MTF of the 0.6 field of view at 110 lp/mm is 0.3, which basically reaches the theoretical value of the design. The overall assembly adjustment effect is good, which provides a basis for the design and implementation of the optical system's adjustment scheme, and realizes the 25 million-pixel high-resolution imaging of the optical system. This lens assembly eccentricity model effectively controls the optical system eccentricity and improves the optics. The efficiency of the adjustment.
The application of dual-field system with simple structure and wide field of view is more and more extensive. A reflective structure system was used to design two optical systems with a large depth of field to achieve the best imaging results for two different fields of view. The main parameters of the system are: the focal length of the lens is 35mm, the diameter of the pupil is 5mm, and the object distance of the dual field of view is 500mm and 800mm, respectively.The number of lenses in the system is only one biconvex single lens, using a combination of axially variable refractive plates. Moving a single lens can achieve focusing, resulting in high imaging quality and overall system structure is simple.
At present, most of the measurement of complex surface volume is based on contact-type manual measurement. The design system uses non-contact photoelectric method to measure the volume of the object. The laser is used to position the center, the object is placed on the rotating stage, and the double camera is captured by the industrial camera. , based on Matlab image processing, calculate its volume, its high precision, speed.
With the ever-increasing use of optical products, the demand to precision of lens manufacturing is more and more strict. In order to improve the precision, we should not only improve the grinding technology, the more important one is the improvement of detecting technology. With the application of surface deviation detection method, we could improve the lens surface accuracy efficiently. In addition, how to finish the precision detection in harsh environment has a very important significance for outdoor debugging assembly and workshop online detection. In this essay, we introduced a synchronous phase shifting optical surface detection system on the basis of Tyman-Green interference light path. It will solve the problem that the system is affected by the environmental disturbance and decrease the detection precision. We used two-dimensional grating as light splitting component, the polarization matrix as the phase shifting element to realize the acquisition of four polarization images with fixed phase difference at the same time, which can eliminate the influence of the environmental disturbance and improve the detection accuracy by the software algorithm. In order to provide the conditions for the system to detect the lens in the harsh environment and the online detection of the lens in the workshop.
The optical surface deviation of the lens can directly affect the quality of the optical system.In order to effectively and accurately detect the surface shape, an optical surface on-line detection system based on polarization interference technology is designed and developed. The system is based on Tyman-Green interference optical path, join the polarization interference measuring technology. Based on the theoretical derivation of the optical path and the ZEMAX software simulation, the experimental optical path is constructed. The parallel light is used to detect the concave lens. The parallel light is used as the light source, the size of the polarization splitting prism, detection radius of curvature, the relations between and among the size of the lens aperture, a detection range is given.
The optical surface deviation of the lens can directly affect the quality of the optical system. In order to improve efficiency and accuracy of optical surface detection, an on-line testing system for optical surface based on polarizing coherent technology is designed and developed. No lying walls are required for the lens. In other words, they can be checked out the deviation of radius of curvature and astigmatism online. Based on the Tyman-Green interference light path, the system joins the polarization interference measuring technology. This paper makes a theoretical derivation and ZEMAX software simulation on the light path, sets up the experimental light path of the system. At last, comparison on image of Tyman-Green interference technology, the contrast of interference fringe image is improved significantly after joining polarizing coherent technology. And background noise and stray light are significantly reduced. It provides the foundation for improving the precision of image processing.
Singlet oxygen (1O2) is commonly recognized to be a major phototoxic component for inducing the biological damage during photodynamic therapy (PDT). In this study, a novel configuration of a thermoelectrically-cooled near-infrared sensitive InGaAs camera was developed for imaging of photodynamically-generated 1O2 luminescence. The validation of 1O2 luminescence images for solution samples was performed with the model photosensitizer Rose Bengal (RB). Images of 1O2 luminescence generated in blood vessels in vivo in a well-controlled dorsal skinfold window chamber model were also recorded during PDT. This study demonstrated the capacity of the newly-developed imaging system for imaging of 1O2 luminescence, and the first reported images of 1O2 luminescence in blood vessels in vivo. This system has potential for elucidating the mechanisms of vascular targeted PDT.
With the aim to measure the radius of curvature deviation and the surface form deviation of optical elements online in
the workshop, based on laser testing technique, two solutions of miniaturization without precision guider sphericity
interferometer systems are described, and the principle of systems are analyzed. Compared with the traditional sphericity
interferometer, the systems designed are particularly suitable for testing mirror noncontact online in workshop,
advantaged in compact structure, no precision guider, high efficiency and low costs. The interferometer systems use the
different radius of curvature of existing spherical test plates in the production workshop to produce reference wavefront.
The systems can not only get the astigmatism and local deviation of lens, but also can reflect the radius of curvature
deviation, which provides rapid and nondestructive noncontact online testing.
In the optical fiber communication system, optic passive components such as the optical coupler and acousto-optic
modulator have polarization depending on loss (PDL) and polarization depending on gain (PDG). The polarizer can
change the light of polarization to unpolarized light, so the apparatus and system dependence of polarization could be
reduce. Base on the principle of the Lyot depolarizer, we verified the physics process of Lyot depolarizer and depolarize
with improvement by matrix optics and theory of polarizer. Mathematics calculation with computer is used, and this
paper provides the curves between residual polarization and crystal wedge. Different polarized states of incident light are
obtained. Meanwhile, the results of model are analyzed. The error in produce processing is considered and calculated
first time, which is influence the depolarization performance of depolarize. Based on simulate calculate and results, the
configure parameters and tolerance design method of an improved Lyot depolarize are also establish.