Aspherical Lens

Molded Glass Aspherical Lens

Name: Molded Glass Aspherical Lens
Rating: 4.5 (100 reviews)

Glass molding is a precision mold with a specific shape at a certain temperature and pressure. The glass preform is pressed to obtain a high precision, high surface quality optical grade lens, Lenses made with precision molding technology usually do not require cold working and polishing, which reduces raw material consumptions, reduces labor and material costs and enables aspherical lenses to be produced in large quantities at low cost.

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Key Features

Materials

Optical glass such as K9, fused silica, sapphire, MgF2, silicon (Si), ZnSe, ZnS, etc. These materials possess high transmittance, low absorption, low scattering, uniform refractive index, and specific dispersion characteristics.
Shape

Precisely hemispherical. The machining precision of the center and radius of curvature of the sphere is extremely high.
Surface Quality

The surface is precision polished to an optical grade of 10-5 to ensure image quality and reduce scattering and aberrations.
Coating

An AR coating is typically applied to the concave surface to maximize the transmittance of specific wavelengths of light (e.g. visible light) and reduce reflection loss.

Drawing

Specification of Molded Glass Aspherical Lens

Item/Diameter(mm)		2-7	7-15		15-24	24-35		35-800	Remark
Item/Diameter(mm)		2-7	7-15		15-24	24-35		35-800	Remark
PV		0.6μm	0.8μm		1μm	1.2μm		2-5μm	Tangent angle of aspheric edge is key factor
Best fit PV		0.2μm	0.3μm		0.4μm	0.6μm		1-3μm
AS		0.15μm	0.2μm		0.3μm	0.5μm		-
Center thickness tolerance		±3μm	±5μm		±10μm	±15μm		±15μm
Sag tolerance		±5μm				±10μm
Out	routine	±3-5μm	±5μm		±5-10μm	±10μm		±10μm	Outside diameter processing technology is key factor
diameter tolerance	Side cut	High precision		Medium precision			Commercial precision
diameter tolerance	Side cut	±0.03		±0.05			±0.1
Tilt		High precision		Medium precision			Commercial precision
Tilt		60”		90”			120”
S1-S2 Decenter		3μm	3-5μm		5-7μm	10μm		15μm
Appearance level		40/20	40/20		80/50	80/50		80/50	Material is key factor
Appearance level		60/40	60/40		60/40	60/40		80/50	Material is key factor

Typical Application Areas

Underwater Photography and Detection:

Observation windows for underwater cameras, ROVs (Remotely Operated Vehicles), and AUVs (Autonomous Underwater Vehicles). The hemispherical design provides a near 180° wide field of view while withstanding water pressure.
Underwater Photography and Detection:

Observation windows for underwater cameras, ROVs (Remotely Operated Vehicles), and AUVs (Autonomous Underwater Vehicles). The hemispherical design provides a near 180° wide field of view while withstanding water pressure.
Underwater Photography and Detection:

Observation windows for underwater cameras, ROVs (Remotely Operated Vehicles), and AUVs (Autonomous Underwater Vehicles). The hemispherical design provides a near 180° wide field of view while withstanding water pressure.