New Mitsubishi 1.8W 638nm diode in 9mm package

Down with Umbrella said:

I have a solution to this problem: hold laser in hand viewing greatest divergents. Rotate handheld unit 90 degrees till beam divergences appears to improve. :crackup: :crackup:

Kidding of course but yes beam correction is something that would be applicable for many diodes. Especially in the highpower blues and of course reds.

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Lol I love showing the high power blues to other people and they tell me how great the beam looks. Then I rotate 90 degrees... Wheres the beam? :crackup:

Well...as for the NDB7A75's....when I get one....I will throw this on the business end !!

http://laserpointerforums.com/f49/a...any-hand-held-unit-proto-type-done-89122.html

EZ !!!....Just gotta get the radial position correct as the beam hits the optics !!

IMNSHO....It also makes sense to "throw some glass" on the front end to "hammer and forge" the beam into all that it can be...within the laws of optics and physics and then...

^^^^^

Love this guy

Actually I already done some tests on 3,5W 445nm diodes. And the beam spot after correction is almost the same as the M140 without correction.

It is really HUGE power and visibility. At 3,5A (nothing overclocked) I managed to receive 4,3W power at the output with three element lens. Of course there are 3 element lens better and worse, but anyway 4,3W is impressive without overclocking. (I was cooling the diode with TEC set at 19*C)

After getting 20 posts I will make a sales thread with my optics, hope you will be interested, especially that LPF will get discount

Tomorrows System said:

Actually I already done some tests on 3,5W 445nm diodes. And the beam spot after correction is almost the same as the M140 without correction.

It is really HUGE power and visibility. At 3,5A (nothing overclocked) I managed to receive 4,3W power at the output with three element lens. Of course there are 3 element lens better and worse, but anyway 4,3W is impressive without overclocking. (I was cooling the diode with TEC set at 19*C)

After getting 20 posts I will make a sales thread with my optics, hope you will be interested, especially that LPF will get discount

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corrective optics? my ears are pricked up!

Well...there are several sources for both Anamorphic prism's and Cylinderical Lenses. The real question is..." How do ya mount them on the business end of a pointer " ??

http://laserpointerforums.com/f49/a...any-hand-held-unit-proto-type-done-89122.html ...is one way to go !

Do we have a real interest ???? MMmmmm ??? Real = 25~50 units.....in my book !! Maybe we can get DTR to carry the EZ units ????????????????????

I would speculate that the 3.5W 445nm and the 1W 520nm can both be fairly corrected with A-prism's....but the P-73 638nm still demands Cylinderical lenses !! It also appears that "Tomorrow Systems" uses Anamorphic Prism's to correct the 3.5W blue....per their website...and it is a very nice website...a bit pricy though, but then, these are TEC stabilized Lab units, likely for extended duty cycle's used in the projector world. Also, I think "Tomorrow Systems" are in Poland...if I did my homework correctly.

Group thoughts ?????

CDBEAM777 said:

Well...there are several sources for both Anamorphic prism's and Cylinderical Lenses. The real question is..." How do ya mount them on the business end of a pointer " ??

http://laserpointerforums.com/f49/a...any-hand-held-unit-proto-type-done-89122.html ...is one way to go !

Do we have a real interest ???? MMmmmm ??? Real = 25~50 units.....in my book !! Maybe we can get DTR to carry the EZ units ????????????????????

I would speculate that the 3.5W 445nm and the 1W 520nm can both be fairly corrected with A-prism's....but the P-73 638nm still demands Cylinderical lenses !! It also appears that "Tomorrow Systems" uses Anamorphic Prism's to correct the 3.5W blue....per their website...and it is a very nice website...a bit pricy though, but then, these are TEC stabilized Lab units, likely for extended duty cycle's used in the projector world. Also, I think "Tomorrow Systems" are in Poland...if I did my homework correctly.

Group thoughts ?????

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Correct! I'm from poland (together with friends).

Here is the hello thread:
http://laserpointerforums.com/f37/hello-poland-91146.html

But incorrect that I'm using prisms - I'm using cylindrical lens pairs.

The prices will change a little because we are editing the site all the time, additionally LPF will have some discounts but I will write in in sales thread after I fulfill all the regulamin requirements

I'm using cylindrical lens inside my modules, not prisms. I designed them myself and I ordered around 400 pieces of this cylindrial lens pair.

One type is for 638nm and one is for 520nm and 445nm. They work amazingly and power drop is nearly visible.

Soon I will have my own mill, so it will be easy to make some lens frames and mounts, since cylindrical lens are not that easily mounted.

corrective optics? my ears are pricked up!

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Here are the photos of the 4W 445nm modules. It has 3,5A current set (not overclocked) and with good cooling the power (after all lens) is 4,2 - 4,3W, without cooling it drops to around 3,8W quite fast. But for sure when you use 5A you will get around 5,5 W ;D Here is the photo inside for you quys.

I also attach beam spot shots.



M140 shots are WITHOUT beam correction.


NDB7A75 WITH beam correction.
Sorry I do not have NDB7A75 without correction but it is similar to Mitsubishi and Oclaro, around 50mm.


As you can see, NDB7A75 with correction is even better than M140 without. So imagine that your M140 had 5W power

Mateusz, Thanx for the internal pics. It is always interesting to see the design of the optical train !
So, you use Cylindericals on everything, now. OK, I assumed Anamorphics per the product description of B445-4000CM laser module.

Cylindericals will correct, and with less power loss than Anamorphics. The down side is they are somewhat harder to mount. What is the magnification of the Cylindericals you use for the 445 ??

I can see how you mount for a lab style, but how for a Hand Held ?????? Ideas ?

The EZ mount could be made slightly longer to accept cylindericals, that is no problem. A small amount of clear epoxy would be used to fix the optics to the Aluminum flat extension. I will post a pic shortly. Well, these are my current thoughts. How much $$ is always a question. Depends on quantity/community interest !

You can find cylindrical lens on my website. There are also magnification parameters.

Price is not very low, but problem was very expensive coating. I needed it to be >99,7% for one lens. So On two lenses you have only around 0,5 - 0,7% power loss.

I would mount them on the flat surface as you mentioned in EZ build. Maybe I would add the valley which you see on my metal part, it is easier to turn lens while adding some thin paper or alu foil.

Just for information in modules I'm using 8,5V 13A peltier module - the diode is producing really a lot of heat.

Well, threw together a drawing of the EZ Corrective Adaptor using the Cylinderical lenses supplied by OptLaser. See the drawings. One shows the EZ with Cylindericals and the other shows the EZ with prism's. Note: two (2) shoulder bars would be attached to center the C-lenses. This method would be used because a machined channel could not be placed all the way against circular bulkhead. Well, that is today's thinking ! Subject to change !!

The difference is in length. The Cylindericals take up more room, about 15mm increase in overall length. I also agree that they suffer from less optical loss than the Anamorphic's.

I do agree that the C-lenses from OptLaser are likely more expensive due the coatings and low loss. I am not convinced they are the best bang for the buck ?? The lenses from LSP are $ 50 vs $ 90 from Opt. Perhaps Dave from LSP can throw in here about the transmission losses from his lenses. IIRC, they are about the same size ??

Well, enjoy the show/thread. I know we focus on power, but, beam density as a function of divergence surly impacts apparent lumonisity...and we do want more lumonisity !!!! Yikes....we want it all !

Why not 3d print spacers to hold the optics in place as you align them and glue onto the heatsink?
I've had this idea for quite awhile just never got into it.

CDBEAM777 said:

Well, threw together a drawing of the EZ Corrective Adaptor using the Cylinderical lenses supplied by OptLaser. See the drawings. One shows the EZ with Cylindericals and the other shows the EZ with prism's. Note: two (2) shoulder bars would be attached to center the C-lenses. This method would be used because a machined channel could not be placed all the way against circular bulkhead. Well, that is today's thinking ! Subject to change !!

The difference is in length. The Cylindericals take up more room, about 15mm increase in overall length. I also agree that they suffer from less optical loss than the Anamorphic's.

I do agree that the C-lenses from OptLaser are likely more expensive due the coatings and low loss. I am not convinced they are the best bang for the buck ?? The lenses from LSP are $ 50 vs $ 90 from Opt. Perhaps Dave from LSP can throw in here about the transmission losses from his lenses. IIRC, they are about the same size ??

Well, enjoy the show/thread. I know we focus on power, but, beam density as a function of divergence surly impacts apparent lumonisity...and we do want more lumonisity !!!! Yikes....we want it all !

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I like the drawing, additional base plate can be significant.
Total outside dimension is 34mm for my lens for 3,5W diode.
As I told, the price can change easily especially for LPF members and also for >1 quantities.
After registration on the site I can give proper discounts for the users.
I was thinking anyway about price drop after 2 months and it is comming with big steps. Prices will be 65 for all cylindrical lens.
All registered users have 3% discount. Additionally for larger quantities I will be giving additional discount, so they will be much cheaper

Guys, no rudeness intended at all here, but this is a thread regarding the Mitsubishi 1.8W 638nm.

This optics discussion is great, but it should probably be in its own thread. People presumably subscribe to this thread because they're looking for updates on the availability of this new diode.

rhd said:

Guys, no rudeness intended at all here, but this is a thread regarding the Mitsubishi 1.8W 638nm.

This optics discussion is great, but it should probably be in its own thread. People presumably subscribe to this thread because they're looking for updates on the availability of this new diode.

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Likewise, I keep checking back to see Mitsubishi 1.8W 638nm diode news.

rhd said:

Guys, no rudeness intended at all here, but this is a thread regarding the Mitsubishi 1.8W 638nm.

This optics discussion is great, but it should probably be in its own thread. People presumably subscribe to this thread because they're looking for updates on the availability of this new diode.

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Sorry you are right. It started to be offtop a little.

Tomorrows System said:

Sorry you are right. It started to be offtop a little.

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Yea...It is all TS's fault !! haha

Even though this 1.8W 638nm Baloney seems to be BS !!! ...and " Phelonious Photon Phog"...We have gone slightly off track !!! I would speculate that..if anyone can get the 1.8W 628nm...Jordan will pull it outa his hat ! Yikes, perhaps it has worse divergence than the P-73 Bad Boy !

TS...let us "pick up our marbles " and move to the Optics area !! I would hope this topic is of interest to many members !:san::san::san: