High Temperature Resistant Reflowable Lens, "MSG," Multi-Complex Super Glass Lens
“MSG” lens, 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 |
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 |
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| 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 |
| Low profile |
S27Z2FLD |
S19Z2 |
S15A2 |
12A2 |
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 |
 |
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| Sensor |
VGA 1/5" |
VGA 1/7" |
VGA 1/10" |
VGA 1/13" |
| Structure |
2P |
2P |
2P |
2P |
| Fno. |
2.8 |
2.8 |
2.8 |
2.8 |
| FOV |
52° |
52° |
50° |
50° |
| TTL |
4.1mm
(including CG=t0.7mm) |
2.33mm
(Including CG=0.3mm) |
1.85mm
(Including CG=0.3mm) |
1.6mm
(Including CG=0.145mm) |
| Thread size |
M6×P0.3 |
M5×P0.35 |
M3.5×P0.2 |
M3×P0.2 |
| Application |
Mobile phone/ Security camera |
Mobile phone/ Security camera |
Mobile phone/ Security camera |
Mobile phone/ Security camera |
| Mega Pixel |
53ZP3 |
S46ZP3 |
M503Z |
34Z4 |
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 |
 |
 |
| Sensor |
1.3M 1/3" |
2.0M 1/3.2" |
3.0M 1/4" |
1.3M 1/4" |
| Structure |
3P |
3P |
3P |
4P |
| Fno. |
3.2 / 5.6 |
3.2 / 4.0 |
2.9 |
3.4 |
| FOV |
50° |
53° |
53° |
54° |
| TTL |
6.5mm
(Including CG=t0.5mm) |
5.48mm
(Including CG=t0.3mm) |
4.4mm
(Including CG=0.3mm) |
7.5mm
(Including CG=t0.5mm) |
| Thread size |
M8×P0.35 |
M7×P0.35 |
M7×P0.35 |
M7×P0.35 |
| Application |
Mobile phone/ Security camera |
Mobile phone/ Security camera/
Barcode |
Mobile phone/ Security camera/
Barcode |
Mobile p/
Security camera (Day & Night) |
| Wide Angle |
W2Z |
W3Z |
M11AG |
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 |
N/A |
| Sensor |
VGA 1/4" |
VGA 1/4" |
SXGA 1/4" |
| Structure |
2P |
3P |
2P·2P |
| Fno. |
2.8 |
2.8 |
2.4 |
| FOV |
108° |
130° |
109° |
TTL |
10.15mm
(Including CG=t1.8mm) |
12.8mm
(Including CG=t1.8mm) |
14mm
(Including CG=t0.5mm) |
| Thread size |
M9×P0.5 |
M9×P0.5 |
M9×P0.5 |
| Application |
Automotive / Security camera |
Automotive / Security camera |
Automotive / Security camera |
About Milestone Co., Ltd.
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Established: June 1998 |
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Capital: ¥83,040,000 |
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Employees: 13 |
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Venture company established to develop small, high-performance plastic lenses for lens integrated camera modules |
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No fabrication, development focused management, holds many patents (80 patents) |
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Invented the world's first camera lens for mobile phones (SH04 Sharp)
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Awarded a patent for reflow lens development and for a reflow resistant hybrid lens of glass and plastic (March 2007)
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Became a subsidiary of Seikoh Giken Co., Ltd. (March 2009) |
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