Dang. Lens flare.

[Uranium]

I've got lens flare on one of my lasers. I've tried cleaning the lens to no avail. It's the line type flare, and is always comes from the same position. [ie turn the lens flare turns too] So, it must be because the lens is uncoated. I can't think of any other reason.

 

[Tabish]

I've got lens flare on one of my lasers. I've tried cleaning the lens to no avail. It's the line type flare, and is always comes from the same position. [ie turn the lens flare turns too] So, it must be because the lens is uncoated. I can't think of any other reason.

Hmm, tried using alcohol / q-tip ? Actually, I wonder if alcohol might be bad for the AR coating...

Any visible marks on the lens / AR coating when held up to the light ?

First of all, which lens ? If it's the 405-G, I think the lens can get loose in the assembly.

 

[Morgan]

Alcohol shouldn't affect the coatings. It's standard issue to clean optics with it and the coating method is pretty hardwearing anyway.

Any pics of the flare? I've seen hairs producing a defraction effect but if you're actively moving cleaning product over the surface of the lens then it should at least change what you see.

M

 

[tazlynx51]

I have a 250mw module I just got that has lens flare also. I thought it was probably just the cheap plastic lens that came with it. This lens assy. is rather loose when it screws into the housing anyway. I will be ordering some glass lenses soon. Hope that takes care of my problem.

George

 

[Uranium]

There is no AR coating and i think that may be the problem.

 

[Trevor]

Is this is your 250mW Viasho unit?

-Trevor

 

[BShanahan14rulz]

circular "swirlies" can do that too.

 

[Trevor]

There is no AR coating and i think that may be the problem.

A lack of an AR coating will cause faint extra dots... is that what you're observing? An uncoated lens along won't cause a line though.

-Trevor