Beiträge von besik33

Kanwas thanks for your respond.
And can you recomend me some product?I was thinking about Dual-Beam Focus Optical System from fraen:
http://www.fraensrl.com/data/f…XP1_0R_datasheet_rev0.pdf

However i can not find where to the buy it . . .

Hello,
I'm using the commercial headlight for binocular loupes.
http://www.ebay.com/itm/Dental…YS-USA-USPS-/110920692823
These tiny headlights consist of the Cree XR-E ?? + narrow beam Collimator (16mmx 11mm).

I'm trying to improve this small headlight to get more lumens per area.

I change the original led for new ones (CREE XP-G, XP-E R3, XM-L U2 etc.) and
I experimented with different collimators (with 6-12 angle - CREE LXP optic 6°, Gaggione LLS12N, Gaggione LLS01N).
While the new leds (CREE XP-G, XP-E R3, XM-L U2 etc.) are better (more lumen), the main problem is collimator.
I can not find collimator of the following parameters - width=16 mm, angle=5° or less.
Can you help me to find similar collimator? I need that this collimator will make tight light circle – diameter approx. 4cm or less at the distance approx. 30 cm.

Another light has combination of collimator + acrylic lens (24mm).
Can you recommend me some type of lens (approx. 24mm) which will concentrate the light?

On the following pictures:

- the original led + original colimator on the left side
- the best combination I have found so far - CREE XML U2 (strongest led i found on the 400mAh) + CREE LXP optic 6° (tight light beam, but not enough)

[Blockierte Grafik: http://img716.imageshack.us/img716/8822/0dsc06681.th.jpg][Blockierte Grafik: http://img542.imageshack.us/img542/9044/1dsc06676.th.jpg] [Blockierte Grafik: http://img502.imageshack.us/img502/547/2dsc06675.th.jpg]

Another light, in which i want to change the acrylic lens to concentrate the light.
In these situation i want to concentrate the light circle on the working area from 4 cm (original) to 2 cm (new).

[Blockierte Grafik: http://img341.imageshack.us/img341/4189/dsc06734wq.th.jpg]

Zitat von "Da Original Fighter"

I have the best results with Cree LEDs.
Therefore I would recommend Cree Q5 LEDs. Luxeon Rebel may also work fine, but I haven't test them since I don't own them

The Cree Q5 has a output of 107-114 lumen at 350mA and 214-228 lumen at 1A so it is brighter than the Rebel with 100 lumen at 350mA.

HI and THX for reply.

I looked for the Cree Q5, and it doesn't seem to be very accesible. (http://www.led-tech.de/en did't found here, need shop for Europe)

Another problem can be that(according datasheets and binnings info):
Cree Q5 has 110lm/350mA but with 90'angle.
Rebel LXML-PWC1-0100 has 100lm/350mA with 160'angle .

I'm not such good in theory. So I take a look at http://en.wikipedia.org/wiki/Lumen_(unit). Now , I'm not realy sure that these angles are without effect.

It has some limitations to make photos with flash (or macro-flash). For example:

Without flash, I can use Exposure Bracketing, ManualFocus bracketing. I think that price will be interresting, too. Normal MacroFlash costs about 500Euros . . . . http://www.pixmania-pro.de/de/…/makro-blitz-mr-14ex.html Expected LED illumination will be up to 100Euro.

I need to iluminate area of size aprox. 5*5cm, from distance aprox.:15-30cm. Now i'm looking for LED with best ratio lumen/current and of course money are important too.

I tried one Luxeon 3W LXHL-LW3C at aprox 1000mA ~ 80lumen with 10'angle lense, and 8 superbright LEDs 22lm - 80mA with 15'angle.
The experiment-photos seems to be good enough, for luxeon.
I was able to take photos from hand (without tripod) for area about 2*2cm. I just need little more LEDs with 20' angle lenses.

I think that 4-6 high power LEDs will be fully sufficient for this.
REBEL's LED seems to be best.

Power consumption with 4 Rebels will be about 4*700mAh. So, I believe that 4(maybe eight) AA 2500mA batteries can withstand this power consumption and will last up to 3hours.

Expected time for shooting is 10minutes - 5times per day, only. So expected time is lower then calculated. :twisted:

So what about this composition?:

http://www.led-tech.de/en/Luxe…-REBEL-LT-1094_49_85.html

http://www.led-tech.de/en/Luxe…-Rebel-LT-1103_49_85.html

http://www.led-tech.de/en/Luxeon-High-Power-LEDs/Luxeon-REBEL/Polymer-Luxeon-Rebel-lense-6x25°-LT-1095_49_85.html

http://www.led-tech.de/en/Luxe…-Silver-LT-775_49_85.html

and some home-made circle heatsink.

Zitat von "bigpuster"

[quote]
The first thing is, that the Seoul P4 has around 240lm at 1000mA.

So it is the LED with the biggest output.

In fact the Cree P4 Emitter in all tests looks brighter than the Seoul P4, although the Seoul has the greater Lumen output.

According datasheet Seoul P4 sel. U
http://www.led-tech.de/produkt-pdf/seoul/Seoul_W42180.pdf under page 5 - u can find code U WHITE LED - this LED is up to 90-118lumens.

Same info is on the web page under "please note"
http://www.led-tech.de/en/High…Sel.-U)-LT-980_55_78.html

According this post http://www.ledstyles.de/ftopic1833.html , Rebel is better then Seoul.

According this post anything http://www.ledstyles.de/ftopic1830.html I cant say anything.

According this post http://www.ledstyles.de/ftopic1187.html I can say, only: Hmm It's very interesting.

Entschuldiegen Sie mich bitte, aber ich spreche sehr schlechte auf deutch.

Therefore I will use English:

I'm making illumination for Camera to shoot Macro-photos without flash.
I know only one professional solution on the market http://www.doctorseyes.cz/php/sety.php . This solution is very expensivy and ligh output insufficient.

Therefore I need LEDs with maximum lumen output. I chceck this forum and I cannot see big difference between the leds. The question is:
Which LED has highest lumen output according your opinion, thx?

I choose the strongest WHITE leds and write the values for "lumen/angle/current/money" according datasheets:

CREE XR-E 7090 P3 on PCB Cree XLamp on PCB:
176lm/92'/1000mA/12Euro (i get confused from datasheet)

Luxeon 3W Star LED LXHL-LW3C:
80lm/160'/1000mA/6Euro

Luxeon REBEL LXML-PWC1-0100:
180lm/160'/700mA/6.7Euro -valuse for 1000mA not writen

Seoul 3.5W Star LED (P4 Version, Sel. U):
120lm/132'/1000mA/8.2Euro

So according to the specifications I choose Luxeon REBEL LXML-PWC1-0100 as brightest LED with lowest power consumption and is the cheapest LED.

But when I browse thorugh the post for the LEDS , i'm not so sure.

THX for your opinion or tests.