Double-Convex Lenses

Material	BK7, FS, UVFS, CaF2, ZnSe, Si, Ge
Diameter tolerance	+0.0/-0.1 mm
Thickness tolerance	±0.1 mm
Clear Aperture	>90%
Focal Length Tolerance	±3 %
Design wavelength	632.8 nm
Surface Quality	40/20 S/D
Surface figure	<λ/[email protected] nm
Centration error	<3 arcmin
Protective chamfers	<0,25 mm x 45 deg
Coatings	uncoated

Price list

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Attention! You can customise this product to your needs.

Description Tables Metrology Optics Protection

Biconvex lenses are used as magnifiers, objectives, condensing systems. Since both surfaces contribute to the power of biconvex lenses, they have shorter focal length than PCX lenses of equal diameter and surface radius. Lenses can be anti-reflection coated (please refer to the Coatings section).

Properties (Diameter D, Focal length L)

D, mm	D, Inches	L Minimal, mm	L Maximal, mm
12,7	0.5	12	10.000
25,4	1	25	10.000
38,1	1.5	40	10.000
50,8	2	50	10.000
76,2	3	75	10.000

Altechna metrology lab applies following product inspection:

Visual inspection – surface quality evaluation according to MIL 13830 and ISO 10110 standards

Dimensions – measurement of geometrical dimensions, as diameter, thickness, etc.

Radius of Curvature (Spherometer)*

Effective Focal Length (Spherometer)

Centering (Centration unit)

Irregularity (Interferometer)

Wavefront distortion (Interferometer)

*(…) used equipment

Optics Protection

Polymer film First Contact™ is a unique product designed for laser optics protection, preservation and cleaning. For all sorts of optical items it serves as a protection layer from damages during shipping, long term storage, environment changes, etc. and removes all dust and other contamination after the film is removed from the optical surface. It is absolutely safe for almost all types of optics and optical coatings.*

Protects against scratching, abrasion, dirt, and water damage. Also protects against corrosion caused by water vapor, oxygen, and sulfur.
Cleans the surface, removes particulates and organic contaminants.
Leaves no residue.
Leaves no hazardous waste.
Safe to store for up to 4 years (period may be extended depending on storing conditions).
Comes off in one piece.
Does not lift metal from metal films.
Safe with temperatures up to 200° C.
Environmentally friendly

* Protective polymer cannot be used with optical components sensitive to acetate.

Price – 3 EUR per item (price includes coating service and polymer)

If you want to order protective coating please select "Optics Protection" in the catalog list.

Removal instructions:

Removal instructions Removal instructions 2

Holding the sticker slowly peel the film starting from the edge. If necessary place the optic in its corresponding mount prior to removing the film.

Technical information:

Order your item

Material	Diameter, mm	Edge Thickness, mm	Focal length, mm	ROC1, mm	ROC2, mm	Delivery	Product ID	Price	Action

BK7	12.7	2.0	+12	11.25	-11.25	1-3 days	1-BCX-1-A127	28 €
BK7	25.4	2.0	+25	24.07	-24.07	2-4 weeks	1-BCX-1-A254	32 €
BK7	12.7	2.0	+15	14.57	-14.57	2-4 weeks	1-BCX-1-B127	28 €
BK7	25.4	2.0	+30	29.53	-29.53	2-4 weeks	1-BCX-1-B254	32 €
BK7	12.7	2.0	+20	19.88	-19.88	2-4 weeks	1-BCX-1-C127	28 €
BK7	25.4	2.0	+35	34.86	-34.86	2-4 weeks	1-BCX-1-C254	32 €
BK7	25.4	2.0	+50	50.6	-50.6	2-4 weeks	1-BCX-1-D254	30 €
UVFS	12.7	2.0	+15	12.81	-12.81	2-4 weeks	1-BCX-2-A127	48 €
UVFS	25.4	2.0	+30	25.99	-25.99	2-4 weeks	1-BCX-2-A254	58 €
UVFS	12.7	2.0	+20	17.56	-17.56	2-4 weeks	1-BCX-2-B127	48 €
UVFS	25.4	2.0	+40	35.48	-35.48	1-3 days	1-BCX-2-B254	58 €
UVFS	12.7	2.0	+25	22.23	-22.23	2-4 weeks	1-BCX-2-C127	48 €
UVFS	25.4	2.0	+50	44.79	-44.79	2-4 weeks	1-BCX-2-C254	58 €