I am redesigning my knife edge tester to include a different
light source and a Quick Cam VC so I am using a make shift Ronchi tester for now. I use RONWIN20 to generate the Ronchi simulations for my parameters at the standard offsets
-.3, -.1, .1, .3, .5, .7 inch. When I look at the actual versus the expected at these zones I get the following results. I started at zone .7 outside the COC and moved inward. .7 was my matching point and I had to match 1/4 wave over corrected because thats as close as I could get.
Zone .5 1/4 under corrected
Zone .3 a little more than 1/4 under corrected
zone .1 looks good
zone -.1 looks good
zone -.3 1/4 under corrected
I'm not sure how to translate this into surface info. I think my mirror is close to 1/4 wave but now I want to try to improve zones on the mirror. Do I need to get my Knife edge back in service or does this Ronchi info give me surface zone information that I can use to continue figuring.
Sorry for the newbie questions but I can find what I'm looking for.
Thanks Dave
light source and a Quick Cam VC so I am using a make shift Ronchi tester for now. I use RONWIN20 to generate the Ronchi simulations for my parameters at the standard offsets
-.3, -.1, .1, .3, .5, .7 inch. When I look at the actual versus the expected at these zones I get the following results. I started at zone .7 outside the COC and moved inward. .7 was my matching point and I had to match 1/4 wave over corrected because thats as close as I could get.
Zone .5 1/4 under corrected
Zone .3 a little more than 1/4 under corrected
zone .1 looks good
zone -.1 looks good
zone -.3 1/4 under corrected
I'm not sure how to translate this into surface info. I think my mirror is close to 1/4 wave but now I want to try to improve zones on the mirror. Do I need to get my Knife edge back in service or does this Ronchi info give me surface zone information that I can use to continue figuring.
Sorry for the newbie questions but I can find what I'm looking for.
Thanks Dave
