04 NT 025 Quality Concave Lens
Description
Negative lenses form a reduced virtual image of a real object (as in door viewers). However, if inserted in a system such as a microscope upstream from an image plane, the image will be magnified and projected further. Such a lens is known in microscopy as a tube-length correction lens and in astronomy as a Barlow lens. We offer these lenses either uncoated or AR coated: the crown lenses (the majority of the range) are coated for visible plus near-IR (450-900nm), and the SF11 high-index lenses have a single-layer AR coating for the visible (see curves). These lenses can readily and quickly be supplied edged to your particular requirements if standard diameters do not suit. Simply click on the 'Modify' button and enter the size you require on the web form. We will get back to you very quickly to confirm your needs and can normally provide the edged lens within 5 working days.
04 NT 025 Quality Concave Lens
Specifications |
|
|---|---|
| Material: | BK7 |
| Diameter: | 2.5 mm |
| Focal Length: | 4 mm |
| Edge Thickness, Te: | 1 mm |
| Lens Type: | Plano-Concave |
Applications
For pricing, technical or any other questions please contact the supplier
- No registration required
- No markups, no fees
- Direct contact with supplier
Contact Supplier
How to order?
-
Ships from:
United Kingdom
-
Sold by:
-
On FindLight:
External Vendor
Claim COMAR Optics Page to edit and add data
Frequently Asked Questions
A concave lens forms a reduced virtual image of a real object. It can also be used in a system such as a microscope upstream from an image plane to magnify and project the image further.
The crown lenses are coated for visible plus near-IR (450-900nm), and the SF11 high-index lenses have a single-layer AR coating for the visible.
Yes, the lenses can be supplied edged to particular requirements if standard diameters do not suit. Simply click on the 'Modify' button and enter the size required on the web form.
The centration is 0.1mm (FL≤40mm) and 2.5mrad (FL > 40mm).
Two typical curves are shown for the 450-900nm coating. Curve 2 applies only to convex surfaces of short radius (R greater than 1.33 x dia.) and Curve 1 to all other surfaces.