To improve the students’ abilities of applying knowledge and hands-on practice, as well as to broaden thinking and cultivate innovative spirits, we establish a new compulsory lab course in the College of Optical Science and Engineering. Through the series of experimental training, students should be able to understand the principle and application of light sources (including gas lasers, semiconductor lasers and solid-state lasers, etc.), radiometry, detectors (photo diode, phototransistor, avalanche photodiode, etc.), and microprocessor. The course is also envisioned to train students’ capabilities of designing and building photoelectric detection instrument according to task demands through the project design.
Course design (experimental preparation, experimental form, process and test, experimental report, assessment methods)
The requirement of experimental preparation
Students need to carefully read the safety regulations before carrying out experiments preview the contents of the experiment and log on the course site for admission test. Students who do not pass the entry test are not allowed to enter the laboratory to carry out experiments.
Experimental form and cooperation
The 3 credits course includes 16 hours of instruction and 64 hours of experiment. The 16 hours of theoretical teaching includes the knowledge related to experimental content and the introduction of experimental notes, experimental principles, etc. The experimental session is divided into 32 hours of basic experiments and 32 hours of project design (comprehensive experiment). Teachers open the laboratory and guide experiment, and 3 students in a group (random combination) complete the experiments.
The project design is completed by a group of three (or two) students, and each subject can be chosen by a maximum of three groups (the early applicants have priority), reimbursable components procurement funds up to 300 yuan (subject to invoices and purchase list).
Experimental process and test
Conscientiously complete and think about each of the phenomena and problems that occur during the experiment, and use theoretical knowledge to explain the experimental principles.
At the end of the experiment, each student must immediately complete an experimental process test, and immediately check the understanding of the content, process and results of the experiment.
Encourage collaboration: Discussing issues with team members will help everyone. However, blatant reproduction and other forms of deception are intolerable, and the teacher will punish such acts.
Experimental report or project summary
Students who attend the course experiment: Write an experimental report and upload the lab report to the course website before the deadline. If there is a personal situation that results in late submission, students must explain it in advance to the teacher.
Students who attend the project design: Participate in the opening defense, mid-term progress report and the final defense, complete the corresponding PPT according to the requirements, and each defense accounts for a certain score. At the end of the project, submit the design documents.
The experimental course is set up independently, and the experimental score is the final score (the total score). There are two parts: 1) course experimental module 50 points 2) project design module 50 points.
1) Course experimental module (50 points), includes:
2) Project design module (50 points), includes:
3) Additional points (bonus points): 5%
(Reward distinct creative projects, creative suggestions, project design novelty, scientific papers, patent application and putting forward projects for the future students, etc.)
Experiment course content and allocation of hours
Routine experiment content (3 students / group)
|Name of experiment||Content of experiment||Allocation of hours||Type of experiment||Requirements of experiment|
|Experiment 1Photodetector andPhotoconductive DetectorCircuit and itsCharacteristicMeasurement||1.Photodiode test2.Photoelectric transistor test3.Light characteristics4.Volt-Ampere characteristics5.The test results are converted by the A/D converter and then displayed6.Set up the test system for LED light intensity distribution test||4||Basics||Compulsory|
|Experiment 2The Principle and DrivingExperiment of Area ArrayCCD||1.The method of measuring the waveform, frequency, period and phase of the vertical and horizontal driving pulses of the array CCD2.Measurement of line, field self scanning TV system of area array CCD3.Measurement of video output signals||4||Basics||Compulsory|
|Experiment 3LCD||1.LCD read and write timing and instructions2.LCD programming||4||Basics||Compulsory|
|Experiment 4Rotating SpeedMeasurement and Control||1.Use photoelectric tube to achieve the click speed measurement2.Use the microcontroller and LCD to display the measurement results in real time3.Use the PID control to adjust the click speed||4|
|Experiment 5Measurement of Line Widthand Output SpatialDistribution of He-Ne Laser||1.Laser line width2.Laser output spatial distribution CCD measurement||4||Basics||Compulsory|
|Experiment 6Characteristics ofSemiconductor Laser andits Spectral Characteristics||1.Semiconductor laser safe operation2.Measurement of working characteristics of semiconductor3.Measurement of fluorescence spectra and laser spectra of semiconductor4.Far-field distribution measurement of slow-axis direction of semiconductor5.Far-field distribution curve of semiconductor5.Measurement of near-field distribution in slow-axis of semiconductor||4||Basics||Compulsory|
|Experiment 7Solid-state Laser Nd: YAGLaser IntegratedExperiments(Including cavity lengthadjustment, cavity typetransformation, beam quality, cavity length and power relationship, cavityfrequency and otherexperiments.)||1.Construction of Nd: YVO4 Laser2.Intracavity frequency doubling, frequency doubling condition and efficiency observation3.Cavity length adjustment; cavity type transformation’s affect on power4.Measure the relationship between cavity length and power5.Beam quality measurement6.The use of the data processing program Origin 6.0||8||Basics||Compulsory|
Each year there will be some reference topics released, combined with Optical-Science-Technology Competition, scientific research and production in the photoelectric technology. Groups of students need to perform researching technologies, determining the program, building the system, contrast test and the final project reply. It is aimed to train the student’s skills to solve practical problems.
|1||An Airborne RescueUnmanned Aerial Vehicle Based on OptoelectronicTarget Recognition||Design an unmanned aerial vehicle for airborne rescue based onphotoelectric target identification. Requirements: use optoelectronictechnology to find the target, and throw the table tennis ball, which issimulated as relief supplies, to the receiving basket. The amount ofcorrectly thrown table tennis ball in specified time determines the results of the contest.|
|2||The best imaging systemconstructed by single lens||Using the given biconvex lens and CMOS image sensor, make advantage ofphotoelectric and image processing technology to build the best imaging system.|
|3||Security monitoring systemin Large space (50m * 50m)||Design a security system for large warehouses, which requires the ability todetect anomalous intruders in time and to obtain clear face images andtransmit images to remote terminals (computers or mobile phones] and alert them.|
|4||Photoelectric distancemeasurement||Measure the distance between the workpiece and another.|
|5||Shaft diameter measuringdevice||Measure the diameter of rod-like, linear or tubular workpieces.|
|6||Space visible lightcommunication||Space information transmission. You can use laser, white light to pass avoice, music, or information coding.|
|7||Photoelectric intelligentinfusion detector||To determine whether the infusion ends and alarm.|
|8||Photoelectric thermometer||Measure objects or body temperature.|
|9||Photoelectric velocitymeasurement||Measure moving object speed and alarm.|
|7||Photoelectric name system||Use optical face, eye recognition or fingerprint recognition to achieveautomatic naming.|
|8||Optical signal simulationcarrier||An optical signal is used as a carrier signal to perform analog signaltransmission such as audio.|
|9||Optical listening||Use the active light source for audio signal monitoring|
|10||Automatic patrol car||A car that is able to identify the 8-shaped lane line and move along the line.|
A new course of Applied Electronics and Optical Laboratory has been established at the College of Optical Science and Engineering, Zhejiang University, in order to enrich the hands-on experience and a of optical instrumentation, microprocessor, electronics and computer programming. The course includes a basic experiments module and a project design module. Basic experiments provide hands-on experience with most of the fundamental concept taught in the corresponding courses. In the project design module, students are encouraged to establish a stand-alone optical system to realize specific function by taking advantage of the basic knowledge learned from section 1. Through these measures, students acquired both basic knowledge and the practical application skills.