An update on TSAL5300 v.s. TSAL6400.
Based on the spec sheets, I think the TSAL5300 is actually a newer as well as a better part than the TSAL6400
bigger numbers aren't always better or all part numbers would be 99999999999 by now.
The 5300 actually has cleaner lensing than the 6400, so though it's only +-22 deg
v.s. the 6400 +/-25 deg, the 5300 will give more even illumination.
Look at Fig. 9 - Relative Radiant Intensity vs. Angular Displacement
here:
http://www.vishay.com/docs/81011/tsal6400.pdfv.s Fig. 9 for the 5300
http://www.vishay.com/docs/81008/tsal5300.pdfAs far as intensity goes, the 6400 specs min typ max at 25 40 125 mW/sr
while the 5300 is 30 45 150 mW/sr so 5300 is slightly brighter.
They are both 940 +/-50 nm so same wavelength
If you need wider angle you can flatten or rough up the LED
Flatten and polish you can get +/-50 - 80 depending on where you do it. (cut the top off square)
Roughing with sandpaper, even 600 grit, will just make the light scatter everywhere and make it dim.
You want wider angle and brighter? go with a VMSx nnnn where x is B F G S etc determining wavelength, and the number "nnnn" will give you some variation in brighness, they are all 100mA flat lens PLCC-2 package LEDs
G