LENS CAP / FLAT WINDOW CAP

P1 for Optoelectronic Device

Lens caps and flat window caps, with lenses or glass windows joined to metal cans of various shapes,
are made for optoelectronic packaging. Our cap products are evaluated as high quality products thatcan be applied to optical communication and the optical sensing field. We propose cap products withoptimum design to meet customer requirements specifications. Also, we are focusing on developing
new products in line with market trends such as miniaturization and higher output. We are working
aggressively throughout the company to meet the increasingly diverse needs of our customers. Pleasefeel free to contact us for both standard and custom-made products.

Ball Lens CapThe ball lens cap is a type of cap in which a ball lens is joined toa metal can made of such material as Kovar or 50NiFe withsealing glass. This product is used in hermetic packages forlight-emitting elements. We mainly offer standard products withlens diameters of φ1.5 and 2.0 for optical communications.

Fused Lens Cap
The fused lens cap is a type of cap in which the lens part isdirectly welded to a metal can. Although the coupling efficiency
is inferior to that of the ball lens cap, the outer diameter of thecap can be smaller than that of the ball lens cap because nosealing glass is required.

Flat Window Cap
The flat window cap is a type of cap in which flat windowmaterial is joined to a metal can using sealing glass. In addition
to borosilicate glass, various materials can be selected as awindow by using appropriate sealing glass. For example, quartz,sapphire, Si, Ge is available.

●FeaturesHigh reliability
High hermeticity

Various standard
products

CustomizedProductsCompatibility: 1 × 10－9 Pa・m3/s or less
Pass the TC(-55⇔+125 ℃) 2000cycs, HHT(85 ℃ 85 %) 2000h
Environmentally friendly, such as lead-free

All types of caps of typical sizes are available as standard
products such as TO-56, TO-46(TO-18), TO-52, and TO-38.
※See the reverse side for details.

Our products are can be customized in size, materials, and opticalcoatings. We will propose the best optical design in accordancewith every customer's requests.

Contact Information
New Product Development Department
4207 Ikonobecho, Tsuzukiku, Yokohama, 224-0053 Japan
URL：https://www.yama-ph.co.jp/en/contact/ (Inquiry form)
This products information is subject to changed or updated without notice.

Oct. / 2021 Ver.1

LENS CAP / FLAT WINDOW CAP

P1 for Optoelectronic Device

We offer a variety of TO-56 and TO-46, TO-52 sized caps as typical standards.
In addition, we also accept custom support in response to customer requests, so please feel free tocontact us.
φ3.55
φ4.70
φ3.55
φ4.70

BALL LENS CAP

TO-56

Shell material: 50NiFeLens material: BK7, TAF3, High Index TypeCap type
TO-56
TO-46
TO-38

φ3.3
φ3.3
φ3.9
φ3.9
φ4.2
φ4.2

φ4.3
φ4.3
φ4.90
φ4.9
φ5.40
φ5.4

Typical index
nd1310nm 1550nm
1.51680
1.50358
1.50065
1.80420
1.77961
1.775532.000691.95038
1.945111.51680
1.50358
1.50065
1.80420
1.77961
1.775532.000691.95038
1.94511

Glass typeBK7
TAF3
High Index
BK7
TAF3
High Index

TO-38

TO-46

Φ2.48
Φ2.9
Φ3.2

Lens
AR
Diameter Coating
φ1.5Pb Free

φ2.0
○

φ1.5○

φ1.2ＢＣFUSED LENS CAP
Shell material: Kovar
Lens material: Borosilicate glass
Cap type

Glass type

TO-52

Borosilicateglass

Mini-Fused

ＡA
2.64
3.1
3.5
3.16 ※totalheightB

C ※effective
diameter

DE

φ4.66

φ0.8

φ4.28

φ5.35

φ1.96

φ0.8

φ1.72

φ2.41

○PJ typeＣＤB ※effective
diameter
φ0.6min
φ1.0min
φ2.0min
φ2.5min
φ4.5min

Non-PJ
0.07

Shell material: Kovar, 50NiFe
Window material: Borosilicate glass

A
φ2.50
φ3.55
φ4.72
φ6.64
φ8.25

ＤＥAR CoatingＡＢ

FLAT WINDOW CAP

Cap typeMini type
TO-56
TO-46
φ9mm
TO-5

Φ2.8C
φ2.20
φ3.30
φ4.35
φ6.20
φ7.85

D
φ3.08
φ4.20
φ5.35
φ7.27
φ9.10

PJ type○○○○-Non-PJ○○(75ﾟ)AR Coating Pb Free○○ＡＢ

SLANTED WINDOW CAPＣＦShell material: 50NiFe
Window material: Borosilicate glass
ＤＥ

Cap type
H3.35
H3.9A

B

φ4.73

φ2.5C※effective
diameter

φ1.8min

DE

4.34

5.35

F
AR coating Pb Free
3.35max○○3.9max

This products information is subject to changed or updated without notice.

Oct. / 2021 Ver.1