[Laser] Chucks question continued

[Chuck Hast]

I just put a 650nm laser in the spectrograph and it gave me a reading of
704 nm. So it is off. Will continue to look at it. I know it works just
have to
figure out what is going on.

On Mon, May 14, 2018 at 8:04 PM, Chuck Hast <wchast at gmail.com> wrote:

> Jim,
> When I plugged in your number I got 532 (it was a rather long decimal but
> for
> effects of calculation it gave 532 nm)
>
> I am using a grating slide, the laser sends a beam through the slide the
> grating
> generates the two side beams at the two maxima either side of maxima 0.
>
> Yes there are reflective ones, but I am using the transmissive slide as
> shown
> in the following instruction:
>
> http://laserclassroom.com/products/measure-wavelength-laser-light/
>
> I did this sort of thing back about 4 years ago, I got a good formula and
> was able to obtain very good results. I had it in a spread sheet, I thought
> I had saved it on a disk but appears it did not get saved.
>
> I know this all works just have to sort it out.
>
> On Mon, May 14, 2018 at 7:40 PM, Jim Moss <n9jim-6 at pacbell.net> wrote:
>
>> Chuck,
>>
>> After rereading, I think my statement on d is not correct. It may be as
>> simple as 1 mm/1000. See link below to Newport.
>>
>> Could the error be related to that you are not reflecting directly off
>> the grating surface? The experiment shows sending the beam thru the
>> grating? If so, could there be an angle error induced?
>>
>>  Could it be that the grating is facing the wrong way? Thus creating an
>> offset due to the medium thickness of the grating material?
>>
>> Good summary on defraction gratings.
>> https://www.newport.com/t/grating-physics
>>
>> Jim
>>
>>
>> Sent from my iPad
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>
>
>
> --
>
> Chuck Hast  -- KP4DJT --
> I can do all things through Christ which strengtheneth me.
> Ph 4:13 KJV
> Todo lo puedo en Cristo que me fortalece.
> Fil 4:13 RVR1960
>
>


-- 

Chuck Hast  -- KP4DJT --
I can do all things through Christ which strengtheneth me.
Ph 4:13 KJV
Todo lo puedo en Cristo que me fortalece.
Fil 4:13 RVR1960