Zinnia: UV Induced Visible Fluorescence - ultraviolet photography II

So, here more of those Zinnia examples that I have shown before indicating what could be done with Nichia based NC4U133 (365nm) / NC4U134 (385nm) systems and my High Power UV LED Radiation System with easily exchangeable radiation heads for nominal wavelength of 365nm, 385nm, 395nm, 400nm and 405nm using the most modern 40W UV LEDs or the simple and now quite common 365nm Nichia flashlights which use the single dice NCSU033A and NCSU033B chips.

[click on image to see a larger one]

Pink Zinnia in visible light: 


Pink Zinnia in UV induced visible fluorescence, variant 1:  


Pink Zinnia in UV induced visible fluorescence, variant 2: 



Red Zinnia in visible light: 


Red Zinnia in UV induced visible fluorescence, variant 1:  


Red Zinnia in UV induced visible fluorescence, variant 2: 


I hope these shots also serve as example what could be done with those UV flashlights, but of course those are useful for many different applications such as stimulating visible fluorescence, reflected UV photography, forensic, dermatological and dental examinations and photographic recording, curing of UV glue / bonding, as well as leakage detection etc.

Stay tuned, more will follow on that fascinating subject as part III...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Zinnia: UV Induced Visible Fluorescence - ultraviolet photography

Well, some people wonder what could be done with Nichia based NC4U133 (365nm) / NC4U134 (385nm) systems and my High Power UV LED Radiation System with easily exchangeable radiation heads for nominal wavelength of 365nm, 385nm, 395nm, 400nm and 405nm using the most modern 40W UV LEDs or the simple and now quite common 365nm Nichia flashlights which use the single dice NCSU033A and NCSU033B chips. Well, here it is without much ado...

[click on image to see a larger one]

White Zinnia in visible light: 


White Zinnia in UV induced visible fluorescence, variant 1:  


White Zinnia in UV induced visible fluorescence, variant 2: 


I hope that serves as an example what could be done with those UV flashlights, but of course those are useful for many different applications such as stimulating visible fluorescence, reflected UV photography, forensic, dermatological and dental examinations and photographic recording, curing of UV glue / bonding, as well as leakage detection etc.

Stay tuned, more will follow on that fascinating subject as part II...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Nichia 365nm flashlight: Beam Homogenizer for reflected UV photography and UV induced visible fluorescence

Today, after having previously shown the Nichia based NC4U133 (365nm) / NC4U134 (385nm) systems and my newest High Power UV LED Radiation System with easily exchangeable radiation heads for nominal wavelength of 365nm, 385nm, 395nm, 400nm and 405nm using the most modern 40W UV LEDs, I present something much easier: a simple beam homogenizing solution for the meanwhile quite commom 365nm Nichia flashlights which use the single dice NCSU033A and NCSU033B chips.

After a long search I finally located a specifically designed beam homogenizing solution that sufficiently transmits UV and allows to generate a quite even radiation field, which is beneficial to have, especially for photography which usually requires even illumination of the target.

I have also tested it working with the newer 4 dice Nichia NC4U133 (365nm) and NC4U134 (385nm) chips, but those are not used for portable flashlights yet as far as I know.

[click on image to see a larger one]

Radiation field without homogenizing solution: 


Radiation field with homogenizing solution: 


Transmission of the homogenizing solution in use:


Theses simple flashlights are useful for different applications, such as stimulating visible fluorescence, reflected UV photography, forensic, dermatological and detal examinations and photographic recording, curing of UV glue / bonding, as well as leakage detection etc.

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Zinnias: human vision vs simulated bee vison; reflected UV ultraviolet photography

Bought a few Zinnias today from my friend Christian Mayer, a very creative florist here in Weinheim, Germany. I'll show this bouquet of various Zinnias in multispectral representation. These shots were taken using inside using my Xenon high power flower flash in normal human vision VIS, in UV using the Baader-U and Jupiter-U filter, as well as in simulated bee vision using my XBV2, XBV3, XBV4 and XBV6 filters respectively as well as the new XNUV filter.

[click on image to see a larger one]

Visual image using a BG40 filter:


Simulated bee vision using XBV3 filter:


Simulated bee vision using XBV2 filter


Simulated bee vision using XBV4 filter:


Simulated bee vision using XNUV filter :


 Simulated bee vision using XBV6 filter :


UV using Baader-U filter:


UV using Jupiter-U filter:


IR (basically) using a simple ND filter:


Unfortunately these bread Zinnias don't show that prominent deep UV patterns as the mexican Zinnia haagena do ... oh well, not all what artificial breedings does leads to pleasant results.


Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Rudbeckia triloba: human vision vs simulated bee vison; reflected UV ultraviolet photography

Today about a Rudbeckia triloba in its multispectral representation, shot in Herrmanshof Park, Weinheim, Germany. I took the shots on a very windy and cloudy day using sunlight in normal human vision VIS, in UV using the Baader-U filter, as well as in simulated bee vision using my XBV2, XBV6 and XNUV filters respectively.

[click on image to see a larger one]

Visual shot:


Simulated bee vision using XBV2 filter:


Simulated bee vision using XBV6 filter:


Simulated bee vision using XNUV filter:


UV using Baader-U filter:


And here a polyptych of them all:


The new filtering technique makes the very prominent UV reflectance of the petals clearly visible.

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

Achromatic Quartz Fluorite Lens: Ultraviolet Photography and Simulated Bee Vision

Well, I had taken apart some older equipment a while ago and have extracted the quartz fluorite optics that was hidden in it. I now have added some focusing helicoid, as well as I had some front and rear adapters made to mount it. Results of using it I had shown here and here and today will even show a few more results using it. A yellow Gazania flower in its last stages served as a model for some multispectral shots, all at approx f8-f11.

[click on image to see a larger one]

Visible light shot:


Simulated bee vision using XBV3 filter :


Simulated bee vision using XBV2 filter:


Simulated bee vision using XBV6 filter:


UV using Baader-U filter:


It only has a quite small focus shift of about 1/2mm when shooting macro, but that could have been expected from a well corrected quartz fluorite lens.


UV transmittance is also quite good, as was expected from a quartz-fluorite lens and stays rather flat even beyond 300nm.

More about that used quartz fluorite lens is  HERE.


Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos

High Power UV LED Radiation System: 365nm 385nm 395nm 400nm 405nm

Today, after having previously shown the Nichia based NC4U133 (365nm) / NC4U134 (385nm) systems, I present here my newest High Power UV LED Radiation System with easily exchangeable radiation heads for nominal wavelength of 365nm, 385nm, 395nm, 400nm and 405nm using the most modern 40W UV LEDs. [Other visible or IR wavelngth also possible as well as high power white light for comparison studies. Optional: infrared or wire remote system control]

A specifically designed beam homogenizing system allows a very even radiation field that can be factory adjusted to a desired size. One example being a 365nm (nominal) head with a 55mm radiation field, evenness of radiation <20%, precisely adjustable radiation strength 2 ... 30mW/cm². The AC operated system is cooled and has been designed for long term radiation sessions up to several hours.

[click on image to see a larger one]

Radiation Head with mounted homogenizing optics:


Homogenizing optics, beam exit aperture showing UV coated fused silica optics:


System in stable operation for some 10.000sec (3h) at full power:


The system is useful for different applications, such as very even UV radiation for photocatalytic processes, to stimulate visible fluorescence, for reflected UV photography, forensic, dermatological and detal examinations and photographic recording, curing of UV glue / bonding, as well as leakage detection etc.

Stay tuned, more will follow on that fascinating subject...

More info on this very interesting field may be found on my site http://www.pbase.com/kds315/uv_photos