The 650-nm point emitter uses an LED with a compact, 55-µm FWHM active region, packaged as a convenient lab or field point source. This configuration offers advantages over conventional LEDs and laser diodes; the circular beam eliminates the need for anamorphic correction, and the wide bandpass suppresses speckle noise.
Regular price$184.00Sale price$184.00
Point Emitter LED
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Superior LED point source
Circular emitter (anamorphic optics unnecessary)
Broadband (20 nm) source suppresses speckle noise
250 ppm photometric stability (< 1 hr)
32 brightness settings up to 1 mW
Standard 1” lens tube package with 1.035"-40 thread
USB rechargeable battery: 7 hr continuous operation mid-brightness
General purpose lab light source
Small, circular spot illumination
Source for a uniform, collimated beam
Optical alignment & characterization
Artificial star
Conventional LED dies are manufactured with a wire bond attached to the anode at the center of the emission window, resulting in an image with a central dark spot. This aspect, together with the integrated epoxy lens common to many commercial LEDs, limits the utility of LEDs in an imaging context. In contrast, the 650-nm point emitter included in this module is manufactured with the wire bond attached to the side of the emission window. The diode image, therefore, lacks the central obscuration characteristic of conventional LEDs. This feature, its compact size (55 µm FWHM), and its circular symmetry make the 650-nm point emitter a suitable point source in many applications.
Contact us to discuss custom solutions, pricing and lead-time. Example customizations include:
Near-infrared diode (e.g., 850 nm, 980 nm)
Optical power
Specifications
Central wavelength
650 nm
Spectral width
15-25 nm FWHM
Emitter size
55 µm FWHM
Emitter symmetry
Circular
Maximum power
1.0 mW
Power settings
32
Power step
0.03 mW (typ.)
Stability @ 0.5 mW
250 ppm RMS (1 hr)
Battery charge time
2 hr
Battery lifetime
7 hr (at 0.5 mW)
Standby lifetime
50 hr
Operating temp
0-30° C
Charger
Micro-USB
Lens tube
1.035”-40 x 1” long
A Superior Point Source
Comparison of the point emitter and a typical LED. Imaging is at x28 using a 0.4 NA Leitz microscope objective and a Canon EOS 40D. The display is linear from zero to maximum intensity. The compact size, shape, and azimuthal symmetry of the point emitter make it a superior point source.
A Quick & Easy Collimated Beam
Comparison of a 12-mm diameter collimated beam formed with the 650-nm point emitter and that formed by a laser diode. The collimator is a 100-mm focal length achromat imaged with a DSLR. The display is linear from zero to maximum intensity. The laser diode illumination is limited by speckle noise, which is much reduced (x50) using the point emitter.
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