Fresnel Magnifying Lens Credit Card Sized Flat Plastic Magnifier
$2.68
This is one item of new fresnel magnifier available in packs of 1, 5, or 10. The material is optical PVC. The plastic is 52 X 83mm and the magnifying area is 42 X 77mm. The thickness measures about 0.47mm. The focal length is about 18cm. You can just about use this to light fires on black paper in bright sunlight but it takes a bit of patience. Of course you can use this as a pocket magnifier, or more interestingly I've used these to project tight beams from infra-red or visible LEDs for light based experimental free space voice or RF link transmission systems, using another similar lens and a photodiode at the receiver end.
In one of the pictures a spot of light is projected onto my wall some 3 metres distant from a simple 5mm bright green LED running at about 18mA. Looking at this from the far end, the single LED and lens combination is impressively bright, like a railway signal. With a keyswitch on the LED you could use it for morse-code signalling over a substantial distance like an Aldis lamp.
Shipping from United Kingdom
Processing time
1 business day
Estimated shipping times
- United Kingdom : 2 - 6 business days
- North America : 8 - 15 business days
- Europe : 8 - 15 business days
- Australia, New Zealand and Oceania : 8 - 15 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Payment Options
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
Please contact me if you have any problems with your order.
Privacy policy
I store no customer data other than that stored in Etsy systems.
Reviews (3)
Average:
Oct 4, 2024
Just as described and perfect for what I needed it for 😊
Tanganiyka Alridge
Dec 22, 2023
It’s a lens and it is good at what it does
Russell
Sep 1, 2023
Leo Mikhalenko