K9 Drum Lenses — GLH17 Series

From $39 USD

Product description

GLH17 drum lenses are made from H-K9L optical glass, with spherical ends and a cylindrical mounting surface along the optical axis. They are formed by grinding the outer diameter of a ball lens to make mounting easier and are used in optical communications.

Their short back focal length reduces the lens-to-fiber spacing required in fiber-optic applications. Focal length depends on the refractive index of the material.

The coating specifications apply to the two polished spherical surfaces, S1 and S2. Available per-model options: Uncoated; VIS antireflection coating; average reflectance <0.5% over 400–700nm; NIR antireflection coating; average reflectance <0.5% over 650–1050nm; SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm.

Drum lens geometry with spherical S1 and S2 ends and cylindrical mounting surface for GLH17 series — Schematic
Dimensions in mm unless otherwise stated.

K9 optical glass is used over the source-stated 350–2000 nm transmission range. The model table lists H-K9L; the general specifications identify fine-annealed H-K9L. The uncoated transmission chart is an N-BK7 reference curve; confirm applicability to the selected H-K9L model.

General specifications

General specifications apply at series level. The table lists the original model diameter, focal length, center thickness, back focal length and S1/S2 coating. Source diagrams are references and must not be used as machining drawings; verify the individual model drawing when ordering.

Material: Fine-annealed H-K9L optical glass

Surface irregularity: λ/4 @632.8nm

Surface quality: 60-40

Design wavelength: 587.6nm

Diameter tolerance: +0.0/-0.05mm

Center thickness tolerance: ±0.005mm

RoHS: Compliant (source statement)

S1 / S2 coating: Uncoated / VIS / NIR / SWIR

Available specifications

USD unit prices. Shipping, taxes and dispatch timing are confirmed with your quotation. Select models and quantities to build your quote list.

20 models

Dia. = diameter; CT = center thickness; BFL = back focal length. Units remain shown in each heading.

								Quote
GLH17-020-025	H-K9L optical glass	2	1.83	2.5	0.58	Uncoated	$39	Quantity for GLH17-020-025

GLH17-020-030	H-K9L optical glass	2	2.2	3	0.7	Uncoated	$39	Quantity for GLH17-020-030

GLH17-030-040	H-K9L optical glass	3	2.93	4	0.93	Uncoated	$46	Quantity for GLH17-030-040

GLH17-040-050	H-K9L optical glass	4	3.67	5	1.17	Uncoated	$50	Quantity for GLH17-040-050

GLH17-050-080	H-K9L optical glass	5	5.87	8	1.87	Uncoated	$56	Quantity for GLH17-050-080

GLH17-020-025-VIS	H-K9L optical glass	2	1.83	2.5	0.58	VIS antireflection coating; average reflectance <0.5% over 400–700nm	$48	Quantity for GLH17-020-025-VIS

GLH17-020-030-VIS	H-K9L optical glass	2	2.2	3	0.7	VIS antireflection coating; average reflectance <0.5% over 400–700nm	$48	Quantity for GLH17-020-030-VIS

GLH17-030-040-VIS	H-K9L optical glass	3	2.93	4	0.93	VIS antireflection coating; average reflectance <0.5% over 400–700nm	$56	Quantity for GLH17-030-040-VIS

GLH17-040-050-VIS	H-K9L optical glass	4	3.67	5	1.17	VIS antireflection coating; average reflectance <0.5% over 400–700nm	$60	Quantity for GLH17-040-050-VIS

GLH17-050-080-VIS	H-K9L optical glass	5	5.87	8	1.87	VIS antireflection coating; average reflectance <0.5% over 400–700nm	$72	Quantity for GLH17-050-080-VIS

GLH17-020-025-NIR	H-K9L optical glass	2	1.83	2.5	0.58	NIR antireflection coating; average reflectance <0.5% over 650–1050nm	$48	Quantity for GLH17-020-025-NIR

GLH17-020-030-NIR	H-K9L optical glass	2	2.2	3	0.7	NIR antireflection coating; average reflectance <0.5% over 650–1050nm	$48	Quantity for GLH17-020-030-NIR

GLH17-030-040-NIR	H-K9L optical glass	3	2.93	4	0.93	NIR antireflection coating; average reflectance <0.5% over 650–1050nm	$56	Quantity for GLH17-030-040-NIR

GLH17-040-050-NIR	H-K9L optical glass	4	3.67	5	1.17	NIR antireflection coating; average reflectance <0.5% over 650–1050nm	$60	Quantity for GLH17-040-050-NIR

GLH17-050-080-NIR	H-K9L optical glass	5	5.87	8	1.87	NIR antireflection coating; average reflectance <0.5% over 650–1050nm	$72	Quantity for GLH17-050-080-NIR

GLH17-020-025-SWIR	H-K9L optical glass	2	1.83	2.5	0.58	SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm	$48	Quantity for GLH17-020-025-SWIR

GLH17-020-030-SWIR	H-K9L optical glass	2	2.2	3	0.7	SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm	$48	Quantity for GLH17-020-030-SWIR

GLH17-030-040-SWIR	H-K9L optical glass	3	2.93	4	0.93	SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm	$56	Quantity for GLH17-030-040-SWIR

GLH17-040-050-SWIR	H-K9L optical glass	4	3.67	5	1.17	SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm	$60	Quantity for GLH17-040-050-SWIR

GLH17-050-080-SWIR	H-K9L optical glass	5	5.87	8	1.87	SWIR antireflection coating; average reflectance <0.5% over 1000–1650nm	$72	Quantity for GLH17-050-080-SWIR

Curves

Typical transmission or coating performance. Refer to the model’s coating range.

Technical notes

Review the material, dimensions and other specifications listed for the individual model. Check any available curves against the model's stated operating range.

Illustrations and printable specification summaries are reference information, not manufacturing drawings. Confirm technical suitability and final requirements with your quotation.

Quote list

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