希望大家?guī)蛶兔Γ￡P(guān)于zemax 的一些問題

有幾個問題想請教下大家，真的很急
1：為什么可用用paraxial理想透鏡做優(yōu)化？它的功能把平行光線匯聚于一點矯正像差的吧，但為什么可以用來做準(zhǔn)直呢？而且thickness和focal length的數(shù)值要一樣才可以？
2：在網(wǎng)上找到一篇用zemax做簡單的準(zhǔn)直優(yōu)化的文章，是一個非序列透鏡，材質(zhì)是pmma，做成反光杯的模樣，當(dāng)做一個tir透鏡，但是這樣不會有光線漏掉嗎？他并沒有介紹要鍍膜或怎么樣
不知道為什么不能上傳圖片和附件，那篇文章叫做《用zemax設(shè)計簡易led準(zhǔn)直鏡》
再次感謝！

hopebox

2012-05-31 21:35

paraxial surface/lens can be optimized so that you know the power of a real lens you will need to use.

for your second question, if rays' incedent angle is less than the critical angle then you would experience lost. the information you provided is not sufficient so it would be hard to make a comment about the actual design concept though. If reflecting thin film was applied you would make use of the ideal coating in ZEMAX to have a quick glance on the performance .

e_solo

2012-05-31 23:30

hopebox:paraxial surface/lens can be optimized so that you know the power of a real lens you will need to use. ,oORW/0iS
for your second question, if rays' incedent angle is less than the critical angle then you would experience lost. the information you provided is not s .. (2012-05-31 21:35) 0v6)t.]s

非常感謝您，第一個問題我只想知道原因，還是說理想透鏡就是用來做準(zhǔn)直的？不是這樣的吧？
第二個問題，我想貼圖，但是網(wǎng)頁總是出現(xiàn)錯誤信息，貼不上。如果是臨界角的話，應(yīng)該可以看到光線射出吧？但是看不到這個現(xiàn)象
第三，希望您能解答一下NSRA操作數(shù)的用法，我知道是追跡非序列模式光線用的，但是在設(shè)置操作數(shù)時，里面的splt，upol是什么意思？還有seg#和dat#讀取的是什么數(shù)據(jù)類型？為什么可以用來優(yōu)化準(zhǔn)直光線？
如果可以的話，您用中文最好，我怕理解出現(xiàn)偏差

e_solo	2012-06-01 15:29
大家?guī)蛶兔Π�，nsra的操作數(shù)那個設(shè)置項功能網(wǎng)上實在查不到了...

hopebox

2012-06-01 16:21

I think in the file you saw, paraxial lens was there to simplfiy the design at the very early stage; just to have some idea about what sort of lens power is required to collimate. In reality, you will need to substitute the real lens later on.

For your second question, you shall check your light source illumination angle and see if majority of the rays hitting at the surface is beyond the critical angle. You may also zoom in the layout to see if some rays do emerge from this surface/lens cos in ZEMAX, if there is no objects ahead of the direction where the rays are travelling to then ZEMAX will normally terminate the ray tracing.

Not usre of the lens or the surface has any coating assigned, if so, you better tick the option of "Use Polarization" and "Split Ray" in order to see some effects that are only accounted under polarization analysis.

"Splt" means having the ray split at interfaces between materials of different index and Upol implies use polarization. You will need to use both settings if rays are partially reflected and transmitted.

When rays are split at an interface into reflected and trasmitted parts, these parts are referred as Segments so it depends on which segments you wish to look at and you may specifiy under seg# field. dat# refers to different data returned, you should check against the user manual for details as there are plenty information. However, you should be aware that NSRA only trace one single ray. To optimize you will need to use NSTR. For illumination wise you will probably find the returned data from the detetctor using NSDD more useful. Under NSDD you could set Pix# = -4 and Data = 1 in order to achieve collimation.

My apologies, from my end it is easier to type English instead.