Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Register Log in
  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

refractive index? 2

Status
Not open for further replies.
screenzzzz

screenzzzz

Industrial
Joined
Dec 16, 2006
Messages
7
Location
US
If a lens was designed for a material with a specific refractive index and the final material came up with a refractive index difference of + .04 how big an effect would it have on the lens performance.

If ones uses the final material what kind of problems could this cause.

Layman
 
Sort by date Sort by votes
Is this for school?

TTFN

FAQ731-376
 
Upvote 0 Downvote
You'll need to be more specific about what you are looking for:
How big of an effect on what? In other words, what errors are you concerned with? What are the wavelength, environmental, etc. requirements and what performance issues are you concerned with?

Harold
SW2009 SP4.0 OPW2009 SP2 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
 
Upvote 0 Downvote
Gary,
I tried to respond to your eamil and it bounced for some reason. Your question:
"I have a lenticular lens plate that was designed for a refractive index of 1.51 and am looking to emboss other plastics, the ones that I am interested in have index's up to 1.54 I am wondering if I am going to have viewing problems of any magnitude caused by said index difference."

If I understand your question (and this is not my strongest area either, I’m the optomechanical person) you should be able to calculate the change in angle of view if you also know the pitch, radius of the lenticule and the center thickness. You can see an example of how to calculate the angle of view at Wikipedia. I think I’d set up a spreadsheet an let it do the work.

I hope that helps you out.


Harold
SW2009 SP4.0 OPW2009 SP2 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
www.lumenflow.com
 
 http://en.wikipedia.org/wiki/Lenticular_lens
Upvote 0 Downvote
Please refrain from having side discussions, since no one else is privy to them.

In the case of a lenticular design, unless they are part of a lens system, or part of some complex design, the index makes little difference to an aesthetic design. The basic errors will be slight magnification and focus changes

TTFN

FAQ731-376
 
Upvote 0 Downvote
In Gary's defense - also from his email:

"Harold for some reason I was unable to find a way of responding to the answer you left."

Don't know why. I agree though that I prefer to keep it on the forum. More input, more benefit to everybody including me.

Harold
SW2009 SP4.0 OPW2009 SP2 Win XP Pro 2002 SP3
Dell 690, Xeon 5160 @3.00GHz, 3.25GB RAM
nVidia Quadro FX4600
 
Upvote 0 Downvote
No problems with you, Harold. I neglected to commend you for posting the relevant details from the email you received.

TTFN

FAQ731-376
 
Upvote 0 Downvote
First of all IRstuff I 100% agree regarding the side conversations, this is why as Harold mentioned I started my response with: "Harold for some reason I was unable to find a way of responding to the answer you left."

Getting on with the thread! I 100% got what I was looking for in the combination of answers from both of you so, thanks a million guys
 
Upvote 0 Downvote
Status
Not open for further replies.

Similar threads

IceMan30
  • Locked
  • Question Question
Index of Refraction for Std ATM
Replies
0
Views
243
IceMan30
IceMan30
damienmorton
  • Locked
  • Question Question
measuring the refractive index of glass microspheres
Replies
1
Views
221
brdf
brdf
Jaer57
  • Locked
  • Question Question
Optical Epoxy with Refractive Index of 1.0008
Replies
10
Views
920
damienmorton
damienmorton
dcopps
  • Locked
  • Question Question
Data for index of refraction as function of wavelength
Replies
5
Views
321
hioptix
hioptix

Part and Inventory Search

Sponsor

Back
Top