Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers



Cylindrical correction optics for 445, 638

drlava

New member
Joined
Mar 7, 2007
Messages
1,152
Points
0
The test units from the final manufacturer have arrived and check out good. They are broadband coated < 0.5% reflectivity. The final total losses including bk7 glass are 3%, vs an estimated 10% for prisms. <0.9 mrad emission is achievable with these (after an ashperic collimator) used to expand the slow axis of 445nm diodes and other multimode diodes with similar emitters, incl. the 500mW reds.

GET LENSES HERE


Beam at 56 feet (17 meters)


dimensions: 12hx9wx3t, 8hx3wx2.5t (mm)
Material: BK7
AR Coating Range: 350-700nm
Surface Quality: 60-40 Scratch/Dig
Surface accuracy: λ/2 curved, λ/4 flat


Set-up distance between lenses: 20mm

To take a note from p1t8ull,
Features compared to anamorphic prisms:
Fixed magnification setup
Less Power loss compared with prisms
Same space taken up as prisms
Beam(s) stay centered after correction optics, offset for prisms

"I can confirm that both beam correcting methods are a bit fiddly to set up, but neither should be beyond the capability for most people here if the basics are correct and time and care is taken."

These are the lenses that will be used in the Blue Lava II kit, please only order from here if you are not getting the kit, or want additional lenses. These will be ordered along with the kit lenses.

GET LENSES HERE

Paypal instructions: Calculate the total using the above google checkout page, then add 1% to cover the paypal fee difference. Then PM me for the paypal address.




round 1
jayrob 1 paid
Marco? 6 paid
kitatit 6 paid
Loopee 2 paid
daguin 2 paid
edison 2 paid
laserbee 2 paid
RedLumX 1 paid
Doc 1 paid
dazebtwn 2 paid
andyf97 2 paid
Laserman532 2 paid
Pardini 6 paid
olive13 3 paid
Villalaser 2 paid
Solinar 1 paid
CrazyMonkey 4 paid
CDBEAM 1 paid
Solarfire 2 paid
Francesco 2 paid
Meatball 1 paid
robjdixon 1 paid
djolek 6 paid
JALEO 6 paid
Morgan 2 paid
laser_freak 1 paid
dstar 2 paid
dar303 1 paid
MechEng3 1 paid
Alexander? 1 paid
Sunfriend 4 paid
Mr. Coffee 1 paid
Cittadini 10 paid
FLowLASER 2 paid
DJJule007 1 paid
oli1212 1 paid
csmn 4 paid
Dyak 3 paid
Showlaser.dk 5 paid
Weartronics 1 out
Ironmen 2 paid



Second round
Yvo? 1 paid CANCELLED
Mackel 31 paid
mojo_1234 2 paid
-Bart- 2 paid
polishedball 2 paid
Igort 1 paid
hemlock mike 1 paid
blowfly 1 paid
lucia calvo 3 paid
krazer 2 paid
Andreas D 2 paid

3rd round
Nestor25 1 paid
LASER66 2 paid
Timothy D 1 paid
Andreas D 2 paid
thegr8revealing 1 paid
Pointiacg5 1 paid
kl79 2 paid
Laser_Kiev 25 + 35 SFL L + 12 aixiz
Lilary W 4 paid
hologeek 1 paid
netmon22 1 paid
massivesound 2 paid
IREEDZ 2 paid
Robin 1 paid
Artemka 21
laser83 2 paid in 2 payments
Giface 2 paid
Richi 4 paid
micksterbs 4 paid
king4quarter 1 paid
 
Last edited:



RA_pierce

Well-known member
Joined
Sep 16, 2007
Messages
3,448
Points
83
Re: Cylindircal correctino optics for 445, 638

You can edit the title yourself by clicking "Edit" and then "Go Advanced" then changing the subject line. ;)
Thanks for sharing this. It looks great. I am interested...

Edit: @TJ Missed your post. Beat me to it.
 
Last edited:

jayrob

Well-known member
LPF Site Supporter
Joined
Sep 21, 2007
Messages
9,870
Points
113
Re: Cylindircal correctino optics for 445, 638

Awesome!

Do you have a sketch of how to set them up?

Or better yet, pictures of your set up?
 

drlava

New member
Joined
Mar 7, 2007
Messages
1,152
Points
0
thanks guys, fixed the title. Yes, a sketch will be forthcoming. Basically the concave lens is used to spread the slow axis and the convex lens is used to straighten it out.
 

jayrob

Well-known member
LPF Site Supporter
Joined
Sep 21, 2007
Messages
9,870
Points
113
Ok, order incoming...

I've never done this set up, but am looking forward to trying it. Are you using an additional collimation lens? And is it before or after the correction optics?

I guess you will show all of that on the sketch...

P.S. I ordered but the Google check out did not record my LPF user name in the form...
 
Last edited:

Tech_Junkie

Banned
Joined
Jan 2, 2009
Messages
11,864
Points
0
Re: Cylindircal correctino optics for 445, 638

You can edit the title yourself by clicking "Edit" and then "Go Advanced" then changing the subject line. ;)
Didnt I say the same exact thing 5 minutes earlier? :thinking:

Are you ignoring my posts or something?
 

Roy G. Biv

New member
Joined
May 6, 2009
Messages
21
Points
0
What is the focal length of the lenses? How much do they expand the beam?
 

daguin

New member
Joined
Mar 29, 2008
Messages
16,565
Points
0
Order in

-- waits for the full modules . . . . . :whistle:

Peace,
dave
 

Gryphon

New member
Joined
May 4, 2009
Messages
1,837
Points
0
used to expand the slow axis of 445nm diodes and other multimode diodes with similar emitters
Would it not be better to compress the fast axis instead, much like a c-mount with FAC.
 

drlava

New member
Joined
Mar 7, 2007
Messages
1,152
Points
0
Would it not be better to compress the fast axis instead, much like a c-mount with FAC.
No, tiny FAC application on a canned diode isn't practical, and correcting only the fast axis on this diode after the collimator leaves you with a pretty bad beam due to the large slow axis emitter. These lenses take care of the axis that spreads at about 4mrad, and bring the beam into a 3.5x2mm size with good divergence.
 

Meatball

New member
Joined
Feb 1, 2008
Messages
2,987
Points
0
Dr Lava,

I would be interested in knowing if these optics are designed to be placed after a collimating lens, or before it. Depending on the type of collimating lens used, would that affect the positioning of these optics?

Also, does the incident beam need to be collimated as tightly as possible to begin with?

I need to know since I'll be knife edging two of the diodes together, and would be interested in using only one set of such optics, AFTER the beams have been stacked..

..maybe I'll just wait for a picture..
 

drlava

New member
Joined
Mar 7, 2007
Messages
1,152
Points
0
Dr Lava,

I would be interested in knowing if these optics are designed to be placed after a collimating lens, or before it. Depending on the type of collimating lens used, would that affect the positioning of these optics?

Also, does the incident beam need to be collimated as tightly as possible to begin with?

I need to know since I'll be knife edging two of the diodes together, and would be interested in using only one set of such optics, AFTER the beams have been stacked..

..maybe I'll just wait for a picture..
These go after the collimating lens. So you can knife edge two beams before sending them through this. The incoming beam should be collimated tightly, yes.
 

Meatball

New member
Joined
Feb 1, 2008
Messages
2,987
Points
0
These go after the collimating lens. So you can knife edge two beams before sending them through this. The incoming beam should be collimated tightly, yes.
Alright! Sounds great!
 




Top