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
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Optical Performance |
Productivity |
Cost |
Heat Resistance |
Compactness |
Capital Investment |
| Plastic lenses |
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| Molded glass lenses |
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| MSG lenses |
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:Excellent
:Good:Not so good:Poor
Structure of MSG Reflowable Lens
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Heat-resistant resin applied on
round-shape flat glass plate |
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Single glass disk based hybrid structure |
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■Cross-section of MSG Reflowable Lens |
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■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 |
M3.5×P0.2 |
M3.5×P0.2 |
M3.5×P0.2 |
| Application example |
Mobile phone |
Mobile phone |
Mobile phone |
Site
Usage Guidelines