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Best Quality II-VI Focusing Lens 20mm Dia 50.8mm mm Focus Length For Higher Power Of Co2 Laser Engraving & Cutting Machine
Laser component
ZNSE MEN LENS
20MM DIA 50.8MM FL
Side 1:CX/AR(LP)
Side 2:CC/AR(LP)
Coated 10.6um
ARROW ONE EDGE POINTS TO THE SIDE 2
Made in China
Clean lens, must be very careful, before cleaning, please look at the following notice:
1. Take lens must wear gloves or rubber gloves, because the dirt and oil droplets on the hand can contaminate the lens, cause performance decline.
2. Dont use any tool to take the lens, such as tweezers, etc.
3. Put the lens on paper, in order to avoid damage.
4. Dont put the glasses on rough or hard surface, infrared lens is easy to scrape.
5. Pure gold or pure copper surface dont clean and touch.
First step :clean the soft light pollutants (dust, the floe content)
Use the air ball blowing off the surface of the lens skimmer, if cannot blow off the pollutant, continue to the second. Note: do not use compressed air of the factory, because it contained a lot of water and oil, oil and water In the membrane of the surface can form the absorption of harmful film.
( the lens with a mirror only need the first step)
Second step :gently clean light pollutants (dust, fingerprint)
Wet the swab or tampon with Sprinkled pure cotton, gently scrub the surface, attention to avoid the hard scrub. Across the surface as quickly as possible, beneficial to the liquid evaporated, not to leave stripe.
If this step cant remove dirt, continue to the third step.
Note:
1) Use the handle paper and high quality cotton for surgery.
2) recommend to use the alcohol of. reagent grade.
The third step : clean the medium pollutants moderately (saliva, oil droplets)
wet the swab or cotton with White vinegar, scrubbing the surface with small force, then use a dry erase the redundant white vinegar. Then immediately wet the swab or cotton with alcohol, wipe the surface gently, wipe out the acetic acid. remained
If this step cant remove dirt, continue to step 4.
Note:
1) can only use the swab with a handle
2) use the high quality cotton for surgery
3) recommended use the acetic acid with a concentration of 6%
Absolutely cant use the fourth step of the clean operating to the new lens. The following steps used only for very dirty lens and cleaning invalid lens. If membrane layer erased, the lens will lost its Function. The color of the obvious change said the membrane of the fall off.
Fourth step a
cleaning the serious pollution of the lens strongly (splash)
For those extreme pollution lens, we use a kind of polishing compound to remove these pollutants.
shake the polishing compound uniform, take 4-5 drops to the cotton, then start to move as a circle gently. Dont press the cotton, the weight of cotton is enough. If use too much pressure, polishing Cream will soon scratch the surface. Flip the lenses frequently, avoid polishing in the same direction excessively. The polishing time should be controlled in 30 seconds. Any time, found the color change, stop Polishing at once, It explain the membrane of the external is corrosion.
Fourth step b
Wet a new cotton With distilled water , clean the surface gently ,all wet with the lens, remove residual polishing compound as much as possible. Dont let the surface become dry, this will be difficult to remove the remaining polishing compound.
Fourth step c
Wet a burred swab with alcohol quickly , clean the whole surface gently, remove residual polishing compound as many as possible.
Note: if the diameter of the lens reaches more than 2 inches, use tampon instead of a swab for this step.
Fourth step d
Wet a burred swab with alcohol, clean the surface gently Remove the polishing compound and sprinkle fine left by the last step. Do the final cleaning with alcohol, wipe away the lens with the swab gently , overlap, until the whole surface is wiped. On the final scrubbing, moving a swab slowly to ensure that the surface of the rapid drying.
This can eliminate the stripes of the surface.
The fifth step : the detection of cleaned lens
The last step is in the sunshine, black background check the lens surface carefully. If discover there remain polishing compound residue, can be repeated 4 b-4 d, until it is completely clear.
Note:
some types of pollution or damage there is no way to remove, such as metal splash, dent, etc. If such pollution or damage lens are found, that means you need to replace the lens
Payment:
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Shippment & Packing
1. We normally declare a lower value for your parcel , to help you avoid the high tax , if more required for the clearance value , please inform us .
2. We are not responsible for the clearance problems by lower declaration wrong or wrong deliver information
3. In order to avoid the custom problem , customer should be confirm the deliver detail before the shipping
4. Customer from Russia need to give full name , customer from Brazil need to give us CPF or company’s CNPJ , customer from AGR need give CUIT
feedback
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Return Policy
If the product you receive is not as described or low quality, the seller promises that you may return it before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe) and receive a full refund. The return shipping fee will be paid by you. Or, you can choose to keep the product and agree the refund amount directly with the seller.N.B.: If the seller provides the "Longer Protection" service on this product, you may ask for refund up to 15 days after order completion.
Seller Service
On-time Delivery: If you do not receive your purchase within 60 days, you can ask for a full refund before order completion (when you click "Confirm Order Received" or exceed confirmation timeframe).Fast Deals Best Quality II-VI Focusing Lens 20mm Dia 50.8mm mm Focus Length For Higher Power Of Co2 Laser Engraving & Cutting Machine
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