FRESNEL LENS SPOT 29"x20" Clear Solar Cooking Heat Mended

Description

Green Power Science is dedicated to the backyard scientist. Our belief is that some of the smartest people in the world discover the best things through trial and error IN THEIR OWN BACKYARDS OR GARAGES. We welcome all levels of creativity and hope you find the answers you are looking for.---1
SHIPPING USA -
All shipping costs
include shipping insurance
(no additional cost) and PROFESSIONAL PACKAGING.
We have been doing this for over 14 years
and we make sure your lens gets there safely!
A Fresnel lens is either a SPOT or a Linear NOT BOTH and there is no "spray on UV" that works.
Anyone who tells you that has no idea what they are talking about and more than likely a random item
seller. WE ONLY SELL SOLAR!!!!!!!!!!!
LISTING INFORMATION:
NOTE: This is an Unframed Spot lens that has been heat mended using a combination of UV cure resin, heat,
and oxygen deprivation compounds to seal and fix any minor cracks or chips to the surface of the lens.
29" X 20" SPOT FRESNEL LENS DISCOUNT
Lens has
several surface scratches
and imperfections.
This does not affect solar performance.
UV resistant for 3 years.
Real tested material!
This is a lens that normally sells for 9.
Due to the restoration it is being sold a BIG "cosmetically challenged"
DISCOUNT!!! See technical data and restoration process BELOW. Also READ "Frequently Asked Questions about this lens.
READ WARNINGS, POWERFUL SOLAR TOOL. NOT A TOY. Scientific research only!!!!!
REAL SPOT LENS.
LENS HAS SURFACE SCRATCHES not visible in this photo.
WORKS PERFECT FOR SOLAR, CHECK THE TEST DATA!
SCIENTIFIC DATA AND PHOTOS ©2015 PROPERTY OF GREENPOWERSCIENCE AND MAY NOT BE COPIED OR USED FOR
OTHER
EBAY LISTINGS
. DOING SO MAY RESULT IN COPYRIGHT INFRINGEMENT. IF YOU DO NOT SEE THE GREEN POWER SCIENCE LOGO, IT IS NOT A SOLAR PRODUCT.
SIZE-----------------29H X 20W
BEAM-----------------SPOT
BEAM SIZE MAX POWER--0.2 INCH
FOCAL LENGTH---------25 INCHES
WEIGHT --------------2 LBS.
MAX TEMP. CLIMB------1370 F
IR THERMOMETER
MAX COLLECTION-------1410F MATERIAL EST...........
MATERIALS TESTED
WATER-------8oz. BOILS 80 sec.
GLASS-------MELTS 1/2 OUNCE
ZINC PENNY--14 SECONDS
WOOD-------INSTANT FLAME
NOT ALL FRESNEL LENSES ARE CREATED EQUALLY.
ALL THE LENSES WE SELL WERE SPECIALLY SELECTED FOR THEIR SUN COLLECTING ABILITIES.
ALL HAVE BEEN TESTED AND THEY ARE THE BEST OF THE BEST FOR SOLAR NEEDS.
FULLY RESTORED LENS IN WORKING CONDITION - JUST ADD A FRAME
HERE IS THE PROCESS:
Lens with crack or chip that goes all the way through. Restored See next photo.
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Area is spot heated to melt plastic, resin is added and deprived of oxygen and a UV cure drop is mixed in.
The area is polished and the restored area or areas are stronger than the original lens. This will not crack or run.
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This is a larger crack that is in the process of running or getting bigger. Next photo shows the restoration.
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The same process listed above is applied but an ultra-highspeed device is also used to permanently stop the crack.
This will NOT re-crack or run. Again, these restored areas are stronger than the rest of the lens.
Frequently Asked Questions:
Q: Does the scratches or restoration areas reduce solar performance.
A: Less than one percent. The area of minor scratches and restorations do block a bit of sunlight but
they are much less than one percent of the total area.
Q: Will the restored crack reopen or run when used or handled.
A: NO, the restored area is stronger than the rest of the lens and this process has been perfected
over a 3 year period. It is UV resistant, resistant to temperature extremes and is not affected
by cleaning, washing, or weather (humidity or rain). It is solid.
Q: Why are you selling these now?
A: These lenses have been stored in a controlled environment for a few years. We have perfected
the process of restoration and they are ready to go. Spot Fresnel Lenses are becoming very, very
rare. This gives the backyard scientist on a budget a great lens at a great price. I actually
use scratch and ding lenses in most of our Youtube videos. Long lasting and powerful!
Q: Do these lenses have the same buyer protection and
money back guarantee as your other lenses?
A: YES, ALL GREENPOWERSCIENCE products are backed with a full 14 day customer satisfaction that currently
has our rating at 100%. Please check our feedback!
Any other questions, please feel free to ask.
We would not sell these if they did not work and
were not 100% tested for solar usage.
WARNING!!!!!
THIS IS NOT A TOY AND THE WINNING
BIDDER AGREES TO THE WARNING AND TERMS BELOW.
WARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun. Lens should
NEVER BE LEFT IN THE SUN UNATTENDED.
Fresnel lenses concentrate sunlight down to an area less than 1/2".
IF YOU DO USE THIS FOR SCIENTIFIC PURPOSES, DO NOT LEAVE OUTSIDE OR NEAR SUNLIGHT EVER. TREAT IT AND RESPECT IT AS A FURNACE OR BLOWTORCH.
Stuff instantly can catch on fire. Buyer assumes all risks and responsibility. I strongly recommend wearing protective eye goggles (wielding/blow torch) to prevent eye damage. Protective clothing (fireproof) is also recommended as well as a large open space away from structures and autos.
CHILDREN OR PETS SHOULD NEVER BE IN WORK AREA!
Buyer agrees to accept all responsibilities and AGREES TO hold seller harmless from injury or damages resulting in the use and possible misuse of this item. MUST BE 18 years or older to purchase.WARNING : I have included a Youtube video to demonstrate the power of this type of lens when placed in the sun.
NEVER STORE EXPOSED LENS NEXT TO ANY STRUCTURE!!!!!!!!!!
NEVER LEAVE LENS UNCOVERED WHEN NOT IN USE!!!!!
Buyer agrees to accept all responsibilities and AGREES TO hold
seller harmless from injury or damages resulting in the use and possible misuse of this item.
MUST BE 18 years or older to purchase.
THIS IS NOT A TOY, REAL SCIENCE STUFF!!!!!