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Photonic Device
Reflowable Lens

High Temperature Resistant Reflowable Lens, "MSG," Multi-Complex Super Glass Lens

MSGElens, invented by Milestone Co., Ltd., a subsidiary of Seikoh Giken, is a lead-free (RoHS Directive) reflowable lens with high performance and high productivity.


"MSG," Reflowable lenses and lens unit

Milestone Co., Ltd. holds the following patents relating to Reflowable Lens technology:
3926380, 3929479, 3946245


Comparison of MSG Reflowable Lens and Other High-Temperature Resistant Lenses

  Optical Performance Productivity Cost Heat Resistance Compactness Capital Investment
Plastic lenses
Molded glass lenses
MSG lenses

:Excellent:Good:Not so good:Poor


Structure of MSG Reflowable Lens

Heat-resistant resin applied on round-shape flat glass plate
Single glass disk based hybrid structure

■Cross-section of MSG Reflowable Lens

■Top surface of MSG Reflowable Lens

Reflow Resistance Test

Post-High-Temperature Test Light Transmittance Data


Lineup for Reflowable Lens

Reflowable S15Si2 T14Si1 X14Si1
Spec/Sensor Size VGA 1/10" VGA 1/10" VGA 1/10"
Lens Structure 2 Group 6 Element 1 Group 3 Element 1 Group 2 Element
F-number 2.8 3.0 2.9
Field Angle(Sensor Horizontal) 52 52 55
Optical Length 1.95mm
(Including CG=t0.35mm)
2.4mm
(Including CG=t0.30mm)
2.6mm
(Including CG=t0.50mm)
TV Distortion <2.5% <2.5% <3.0%
Screw Size M3.5P0.2 M3.5P0.2 M3.5P0.2
Application example Mobile phone Mobile phone Mobile phone

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