The paper presents a novel fiber optic microbend sensor with intelligent self-healing function, which is based upon
the photocurable technology and the mode-coupling theory. In the research, a kind of photocurable material is developed
and injected into the flexible hollow-center fiber embodying the sensitive optic fiber. According to the theory of fiber
optic microbend sensors, the microbending mechanism causes part of the optical power to be radiated out of the fiber due
to the mode-coupling. Especially when the damage of the sensitive optic fiber occurs due to the extremely small bending
radius, the radiation power will increase rapidly. We use the radiation power as the curing light to initiate the
photopolymerization of the photocurable material surrounding the sensitive optic fiber. The scale and speed of the
photochemistry reaction mainly depend on the radiation power and the microbend degree. By this way, the photocurable
material can repair the damaged area in real time according to the damaged state. This paper describes the design and
performances of the intelligent self-healing fiber optic microbend sensor in detail. The experimental results reveal that
the sensor has the excellent sensing property and can adjust its repairing ability according to the damaged degree
Traditional optical image processing system is mostly based on PC, and is restricted in many fields. A novel system of
optical image processing is advanced. It consists of two parts: image acquisition system and image processing system.
Image acquisition system is made up of FPGA, CMOS image sensor and image buffer memory. DSP is selected as the
key element of the image processing system. An extra image buffer memory and an image memory are also used.
Program of optical image processing is written into DSP. Images processed can also be transmitted to display interfaces,
such as LCD, TV, etc. The system can operate conveniently, smoothly and inerrably with high speed and precision.
In this paper, the kinetic equation of photo-initiated reaction was set up by measuring the photoinitiator absorbency
and the exposure time during the exposure process based on the spectroscopic analysis and reaction kinetics. And an
effective and convenient computation model for quantum yields of photoinitiators was established through further
analysis of the exposure process. The kinetics curve of photoinitiator 1173 (HMPP) was determined according to this
method. The results show that the reaction is consistent with the kinetic model established in this paper. And the
quantum yield is 2.4% at the main absorption peak (247nm).
Based on the rotating prism multiple holography and real- time method, we present a new technique which is a synthetic holographic interferometry. The usage of the technique can record both double-exposure hologram and single-exposure hologram on a single holofilm. The usage of rotating prism can modulate plane reference waves to record multiple holograms. When the multiple hologram is exactly restituted and the incident angle of plane reconstruction waves equals a modulated angle of plane reference wave, the reconstructed original image is at the same place as the original object. The place is used as a channel of real-time observation and the others are served to record double-exposure holograms. In this way, both single-exposure and double-exposure holographies can be realized on a holofilm. Observing simultaneously interferograms at standard state recorded by double exposure and `living fringe' provided by real-time method, we can compare the change of standard state with states of different times. The paper presents a synthetic holographic interferometry and provides a new method for precise real-time measurement.