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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Target Dot
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<blockquote data-quote="tulku" data-source="post: 640367" data-attributes="member: 5203"><p>I don't know about the Reticle being Etched into the Glass , but there is a simple Process for Etching the Reticle onto the Glass . This is a Photo- Circuits Process , and goes like this : You take your Glass and coat it with a thin layer of whatever material you want to use as the Reticle . This can be done by Sputtering with a Plasma , Tungsten Boat evaporation , etc . Next you apply a Polymer which is Photosensitive ( mostly to Ultaviolet Radiation ) and is often called a Resist . You apply Ultaviolet Light to expose the Reticle Pattern on it . You Develop off the Resist in the unexposed part of the Light Pattern ( this applies to a Negative Resist ) . You Etch away the Metal Base so that only the Reticle Pattern remains . Strip the Polymerized Resist sitting on top of the Reticle , and you have your finished Reticle on Glass . You can also add a protective coat over everything at this point if you desire . This is how Photocircuits have been made for decades . The equipment to do this is rather costly .</p></blockquote><p></p>
[QUOTE="tulku, post: 640367, member: 5203"] I don't know about the Reticle being Etched into the Glass , but there is a simple Process for Etching the Reticle onto the Glass . This is a Photo- Circuits Process , and goes like this : You take your Glass and coat it with a thin layer of whatever material you want to use as the Reticle . This can be done by Sputtering with a Plasma , Tungsten Boat evaporation , etc . Next you apply a Polymer which is Photosensitive ( mostly to Ultaviolet Radiation ) and is often called a Resist . You apply Ultaviolet Light to expose the Reticle Pattern on it . You Develop off the Resist in the unexposed part of the Light Pattern ( this applies to a Negative Resist ) . You Etch away the Metal Base so that only the Reticle Pattern remains . Strip the Polymerized Resist sitting on top of the Reticle , and you have your finished Reticle on Glass . You can also add a protective coat over everything at this point if you desire . This is how Photocircuits have been made for decades . The equipment to do this is rather costly . [/QUOTE]
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