Transcript 16-1학기 Lighttools tutorial

Optical design
with
Lighttools
®
- Understanding optical design procedure -
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What is Lighttools?
 Simulation Software for optical system design
 Provide various modules for specific uses
 Core module : 3d modeling, optical properties, ray-tracing..
 Other modules : Solidworks link, Optimization, Advanced
physics, illumination, data exchange..etc
 Prototype analysis
 illumination pattern, ray path, intensity distribution..etc
 Provide various library models..
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What is Lighttools?
Applications
LED
Outdoor illumination
Automotive Exterior
lighting
Projector
microscopy
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Execute a program
Advantage - 1
 A variety of LED source
library
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Execute a program
Advantage - 1
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Data entry – lens
parameter - 2
Advantage
 Optimization – reducing time, check design error.
 User defined constraints, merit function
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User interface
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User interface
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User interface
receiver
source element(R,G,B)
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User interface
 Problem1 (1pt)
- Explain about luminous flux(광속), intensity(광도), illuminance(조도), luminance(휘도) and their units
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Example 1
 Problem2 – Design the followings.
•
Air spaced achromatic doublet
http://www.thorlabs.hk/newgrouppage9.cfm?objectgroup_id=6083
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Example 1
1
2
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Example 1
Step1 – left lens
1
2
해당 물질이 librar
에 없으므로 추후에
다른 물질로 바꿔줘
야함
2를 실행하면
뜨는 명령어
R1
R2 tc1
렌즈 왼쪽 vertex를
0,0,0으로 맞춤
렌즈 축의 방향
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Example 1
Step1 – left lens
•
•
첫 번째 렌즈가 디자인 되었음.
그러나 ‘SILICA’를 ‘N-SSK2’로 바꿔줘야 함. ‘N-SSK2’
와 가장 유사한 굴절률을 가진 다른 물질을 카탈로그에
서 찾아서 변경
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Example 1
Step2 – right lens
우클릭 - 숨기기
를 이용하여
airgap부근의 디
자인을 확인
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Example 1
• 초점 위치 확인
• 확대하여 초점 부근의 광선이 제
대로 모이는지, 여전히 수차가
발생하는지 ??
• Lighttools에선 optical imaging system(lens array, digital camera,
microscope, telescope..etc)의 ray path를 확인하기 위해 사용
• imagin에 관한 정보(MTF, aberrations, ...etc)를 얻기 위해선 lmage path
module 필요.
• other imaging system software : CODE-V, ZEMAX,
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Example 2
 Problem3 – catadioptric lens (Total Internal Reflection + Refraction)
TIR lens
•
•
Legacy reflector for LED
Upper diameter : 20mm
Height : 10mm
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Example 2
Step1 – LED import.
보기-렌더링모드-반투명 – 내부의
chip이 보임
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Example 2
마우스 우클릭
R: 2.7mm
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Example 2
SweptEntity로 왼쪽
과 같은 형상을 먼저
형성 후 정렬
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Example 2
윗면 추가
기본값을 위와 같이 변경
하여 아래 두 그림과 같이
나오는지 확인.
LED 삽입부 제거
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Example 2
초기디자인 획득
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Example 2
Bad uniformity in the center
of target plane
Optimization needed!! – (mesh) merit function
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Example 2
•
Merit Function Name (optional): You can rename
the new merit function by
selecting the default name (New) and entering in a
different name.
•
Receiver: If a receiver is currently selected in the
design view or the System
Navigator or if it is the only receiver in the system, it
is selected by default.
If not, select a receiver from the drop-down box.
•
Mesh: If a receiver is currently selected in the
System Navigator or if it is the
only receiver in the system, an associated mesh will
be selected by default.
Click the field next to the Mesh option and select a
mesh type from the list.
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Example 2
optimization variable setting
• appropriate upper/lower bound
• Not all paramters are optimization variable – your desicion
appropriate bound – your
decision
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Example 2
summary of your optimization setup
Optimized uniform illumination
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Summary
 Lighttools has a variety of application such as imaging
system, LED illumination...etc
 It provides a large number of library element.
 Various modules are provided.
 If you want to check feasibility of your own optical system,
Lighttools can be solution.
 Please submit ‘2015xxxxxxx.lts’ file for optimization
example. Also you should make a report about problems
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The End
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