Instrumentation
The Study and Design on Time Domain Spectrum Induced Polarization Instrument
This thesis basing on the theory and the characteristics of Time domain Spectrum Induced Polarization (TSIP), develops a set of induced polarization devices independently. IP instrument contains transmitter and receiver for two separate devices. In addition to observing rocks, ores or specimens of the second field induction effect and polarization effect, but also realize the [...]
Pose Angle Measurement System for Tbm Based on Laser Interference Principle
TBM technology is an effective way which is widely used in underground constructions. So how to get pose angle of TBM with high precision is one of the important aspects in project, and it is also the basis of tunnel construction.In this paper, a precision and anti-interference testing system of TBM’s pose angle has been [...]
Measurement System Research on Multi-degree-of-freedom Based on Laser Collimator
In contemporary industrial field such as microelectronics and ultra-precision manufacture, the displacement and angular measurement of machine guide with high precision are in great demand. Most of conventional multi-degree-of-freedom instru- ment are complicated, large, consisted of plenty of optical elements, and expensive, such as laser interferometer. So to develop a small, simple, high-precision and cheap [...]
The Design and Implementation of Virtual Microscopy System
As a medical science which clarifies the nature of disease, pathology occupies the core position in clinical medicine. Current pathological application is based on physical slides with many problems. It costs much in the purchase, maintenance, storage and distribution of physical slides, and it’s difficult to integrate pathology into existing digital healthcare systems. The development [...]
Study of Red-laser High-definition Optical Pickup Lens with Feature Nanometer-scale Micro-structures
Red-Laser-High-Definition (RLHD) optical storage system, mainly based on high performance optical pickup objective lens (OL) to reduce the focal spot size and improving physical storage format, etc, can realize high-capacity and high-density optical data storage and reading. In order to reduce the focal spot size of converged red-laser, an optical pickup OL beyond the diffraction [...]
Research on Diffractive Objective Lens of Optical Pick-up for Red-laser High-definition Optical Storage
In this thesis, a new type of optical pick-up objective lens (OL) for next-generation versatile disc (NVD) system of red-laser-high-definition optical storage system, is designed. The performances such as the focal spot size being about 0.5μm, the focal length being about 3mm, and having high utilizing efficiency of optical radiation, are demanded. Based on the [...]
Design and Implementation of a FPGA Based Data Analyze System for Two-dimensional Doppler
PAT (Positron Annihilation Technique) as a modern micro-analysis method, has been applied in many areas such as solid state physics, material science, chemistry, physics and metallurgy. It can provide unique information on electronic structure and defects of solid and thus play a very important role in the study of these areas. From half a century [...]
A Design of Amplifier and Sampling Circuits for Infrared Spectrometer
One of major side effects coming up with modern industry’s explosive increasing is atmosphere problem such as global warming and air pollution. However, detecting atmosphere’s composition is precondition for any solution. Direct contact measures become unpractical for some important layers of atmosphere, so remote sensing device such as infrared (ab. IR) spectrometers are widely used [...]