Archives: Landing Domains

Orange sharp cut filters

Orange glass sharp cut filters are designated as 0 530, 0 540, 0 550, 0 565 and 0 580.

O 530 is equivalent to Schott	OG 530	and Hoya –
O 540 is equivalent to Schott	–	and Hoya O-54
O 550 is equivalent to Schott	OG 550	and Hoya –
O 565 is equivalent to Schott	OG 570	and Hoya O-56
O 580 is equivalent to Schott	OG 590	and Hoya O-58

Contact Valley Design for all your color glass applications.

Red sharp cut glass color filters

Red glass sharp cut filters available are R 600, R 610, R 630, R 640, R 650, R 670, R 700, R 720

R 600 is equivalent to Schott	–	and Hoya R-60
R 610 is equivalent to Schott	RG 610	and Hoya –
R 630 is equivalent to Schott	RG 630	and Hoya R-62
R 640 is equivalent to Schott	RG 645	and Hoya R-64
R 650 is equivalent to Schott	–	and Hoya R-66
R 670 is equivalent to Schott	RG 665	and Hoya –
R 700 is equivalent to Schott	RG 695	and Hoya R-70
R 720 is equivalent to Schott	RG 715	and Hoya R-72

Valley Design is available for red glass filter applications from research and development through prototype and production.

For blue color filter glass cross-referenced to Schott and Hoya, click here.

For blue spectrum filter glass transmission curves, click here.

Click here for all color filter glass specifications and transmission curves.

Contact Valley Design for blue filters from research and development through to prototype and production stages.

Didymium wavelength calibrating filter
Wavelength calibrated filters are designated as WL 01.
WL 01 is equivalent to Schott BG 20 and Hoya V-10

Return to Home Page: Polished silicon wafers and polishing services

Please click on the following links for further technical details and specifications on these special black coatings:

• Thin black approx 0.5 micron, selective coating, controlled morphology with stability and high thermal efficiency.
• Extremely low reflectance black optical coating.
• Wide band black optical coating for UV, VIS, SWIR, MVIR, and LWIR consisting of a completely inorganic layer of low thickness.
• MWIR and LWIR (medium and low wavelength infrared) black lo reflectance coating.
• Light absorbing patternable coating on wafers from almost any material.
• Black ultra-diffusive light absorbing foil for UV, VIS, and IR. For lowest reflectance information, click here.

Key features of black optical coatings include:

• Very low reflectivity coatings
• Tailorable electrical resistivity – conductor or insulator
• Etching or lift-off technology
• 3 micron feature size
• Virtually any substrate material – silicon, glass, ceramic, etc.
• No particulation
• Compatibility with lithographic process chemicals
• Vacuum, cryogenic and clean room compatible

For a listing of all optical black coating types, click here.

Stainless Steel wafers and substrates may be used for various applications such as solar cells, thick film circuitry, heaters, and for many R&D and medical applications. SS wafers are available in standard SEMI diameters with various finishes ranging from a few Angstroms to rough machined surfaces, and in all thicknesses from as thin as 25um up to large thick vacuum chucks. Standard wafer thicknesses are 50um, 125um, 250um, 500um, 1mm and thicker.

Commonly available surface finishes for these Stainless Steel wafers and substrates include:

• As-machined
• Abrasive lapped
• Diamond lapped
• Buffed
• Fine buffed
• Polished
• Fine polished
• Optically polished

Stainless Steel grades commonly available are 304SS, 316SS and 430SS. Depending on the required surface finish, 304SS wafers are stocked in evaluation quantities. 316 Stainless Steel wafers contain molybdenum, and as such, have excellent corrosion resistance. When specifying SS wafers from Valley, please provide your specifications for geometry, thickness, thickness tolerance, total thickness variation, flatness and surface finish required. Please call or e-mail for more details, or for a quotation per your specifications.

For metal optics requirements, please go to https://valleydesign.com/polyimide-substrates/.

Other related web pages:

• Metallic mirrors vs. pure metal mirrors
• Molybdenum metal polished mirrors and optics
• Polished stainless steel wafers
• Stainless steel Optics
• Superpolished metal optical components

Stainless Steel Surface Finish Data

Return to Home Page: Stainless steel substrates, wafers and optics

Polycrystalline silicon solar cells and GIGS2 solar cells have the potential for achieving higher conversion efficiencies and because large scale deposition techniques can be utilized, cost projections are that these solar cells can be several times less expensive than presently manufactured crystalline multijunction solar cells.

Advantages of thin film solar cells on stainless steel:

• Light weight
• Durable
• Flexible
• Possible roll to roll thin film deposition
• High radiation tolerance

304SS, 316SS and 430SS stainless steels are used as substrate material for thin film solar cells and can be obtained from Valley Design.

Please call or email for a quotation to meet your requirements.

Return to Home Page: Stainless steel substrates, wafers and optics

As steel is heated above critical temperature (approx. 1335 F) it undergoes a phase change, recrystallizing as austenite. Continued heating to approx. 1450 – 1500F assures complete conversion to austenite. The high chrome and nickel content of austenitic stainless steel suppresses the transformation on cooling to a ferrite/cementite, keeping the material fully austenite, as well as rendering it essentially non-magnetic in the annealed condition. This gives austenitic stainless steels excellent cryogenic properties, good high-temperature strength and oxidation resistance. Excellent corrosion resistance, non-magnetic properties and exceptionally high toughness at all temperatures make these steels suitable for a wide variety of applications.

Physical Properties of 304 SS Wafers and Foils

Density:	7.90 g/cu cm	0.285 lbs/cu in
Melting Point:	1.399 – 1421 C	2550 – 2590 F
Specific Gravity:	7.90

Electrical Resistivity

Thermal Conductivity

Coefficient of Thermal Expansion

Magnetic Permeability

Hardness, Max.

MECHANICAL PROPERTIES

Tensile and Yield Strength

Modulus of Elasticity, Annealed: 29,000 KSI

CHEMICAL PROPERTIES

Type 304 Stainless Steel Chemnistry % by Weight

Carbon Content

Other related web pages:

• Metallic mirrors vs. pure metal mirrors
• Molybdenum metal polished mirrors and optics
• Polished stainless steel wafers
• Stainless steel Optics
• Superpolished metal optical components

Stainless Steel Surface Finish Data

Return to Home Page: Stainless steel substrates, wafers and optics