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Re: The 500mW Mitsubishi ML501P73 635nm/638nm diode is in
I thought I would add to the ML Red frenzy !!! It IS possible to optically beam correct these diodes…in a pointer format !!! At one time…I thought the 445 could also benefit from optical correction….for a pointer application. That was big time over kill !!! The O-Like glass aspherical does a more than adequate job…for the 445. The ML series is NOT that lucky !!! Without beam correction that goes beyond the 405-G-2 lens….the divergence is over 8 mR….your basic fan !!
It is well known… that the ML beam can be corrected with cylindrical lenses….one plano concave and one plano convex. I have read some comments which suggest this beam correction solution cannot be applied to the ML series.... IN A HANDHELD FORMAT.
Although I have not machined the components shown in the attached drawings…I see NO reason this design cannot be done. The resulting beam will be very close to the collimated 445 LD….at about 1.2 mR divergence !!! I have done the set up in a bench style unit. (See Pic )
The Guidesman 21 would be a good host for the necessary optics...although a more compact host…such as the Tank 007…or many others… would perhaps provide a smaller profile. Regardless…take a look at the design.
A typical 12 x 30 Aixiz module does not provide a tight enough fit between the M9threaded lens and mount….so a custom brass unit must be machined. The demands of the beam correction optics require that the collimation lens be completely centered. A loose or taped fit will not due in this application. The mount which holds the correction optics could be machined from clear acrylic. These optics would be set in place with epoxy.
Anyway…with the new work being done with the 500 mW plus ML501P73 diodes….it seems as though a beam correction for handhelds will be desireable !!! This is just one way to do it…that I know will work !!
CDBEAM
I thought I would add to the ML Red frenzy !!! It IS possible to optically beam correct these diodes…in a pointer format !!! At one time…I thought the 445 could also benefit from optical correction….for a pointer application. That was big time over kill !!! The O-Like glass aspherical does a more than adequate job…for the 445. The ML series is NOT that lucky !!! Without beam correction that goes beyond the 405-G-2 lens….the divergence is over 8 mR….your basic fan !!
It is well known… that the ML beam can be corrected with cylindrical lenses….one plano concave and one plano convex. I have read some comments which suggest this beam correction solution cannot be applied to the ML series.... IN A HANDHELD FORMAT.
Although I have not machined the components shown in the attached drawings…I see NO reason this design cannot be done. The resulting beam will be very close to the collimated 445 LD….at about 1.2 mR divergence !!! I have done the set up in a bench style unit. (See Pic )
The Guidesman 21 would be a good host for the necessary optics...although a more compact host…such as the Tank 007…or many others… would perhaps provide a smaller profile. Regardless…take a look at the design.
A typical 12 x 30 Aixiz module does not provide a tight enough fit between the M9threaded lens and mount….so a custom brass unit must be machined. The demands of the beam correction optics require that the collimation lens be completely centered. A loose or taped fit will not due in this application. The mount which holds the correction optics could be machined from clear acrylic. These optics would be set in place with epoxy.
Anyway…with the new work being done with the 500 mW plus ML501P73 diodes….it seems as though a beam correction for handhelds will be desireable !!! This is just one way to do it…that I know will work !!
CDBEAM
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Its one of the 2 that i just bought from you last time. Just the bare lenses. Remember.
