Point Emitter LED

In stock

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 $184.00 Sale price $184.00

  • 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


Central wavelength650 nm
Spectral width15-25 nm FWHM
Emitter size55 µm FWHM
Emitter symmetryCircular
Maximum power1.0 mW
Power settings32
Power step0.03 mW (typ.)
Stability @ 0.5 mW250 ppm RMS (1 hr)
Battery charge time2 hr
Battery lifetime7 hr (at 0.5 mW)
Standby lifetime50 hr
Operating temp0-30° C
Lens tube1.035”-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.