Single Point Diamond Turning (SPDT)
                     SINGLE POINT DIAMOND 
TURNING (SPDT)
https://www.opticsindia.com/product/spdt/

 Single Point Diamond Turning (SPDT) is an Ultra-precision 
Machining Process, which delivers surfaces with Form Tolerances 
within Sub-Micron Accuracies & Roughness within few Nanometers
How   SPDT is achieved?  
 SPDT Process is a Near Ideal Marriage of: Interaction of Precision 
Diamond Tool, Controlled Lathe Operation, Deterministic Precision 
Material Removal, Strict Machining Protocols, Meticulous Surface 
Characterization
Why SPDT is Required?
 To Deliver Systems with Budgets on Weight, Volume & Foot-Print.
 For Neo-Compact Precision Modules.
 To Deliver Surface Quality: Sub-Micron Form & Figure Error and Single Digit Nanometric Finish. 
 
SPDT Deliverables & Profiles
Surfaces with Profiles:
 Flats
 Rotationally Symmetric Profiles (Spherical, Oblong & Prolate Ellipsoids, Parabolic,  Hyperboloids)
 Off-Axial Components
 Torics (with Fast & Slow  Tool Servo Accessory)
 Lenslet Arrays
Materials, Measurement & Accuracies
 
SPDT Processable Materials
 Metals: Aluminum & Alloys, Brass, Bronze, Copper & Alloys, Nickel & Electroless Nickel, Tin, 
Antimonoy, Silver, All Non-Ferrous Metals, Low-Carbon Steels & Special High HRC Steels.
 Crystals & Glasses: Germanium, Silicon, CaF2, ZnS, ZnSe, GASIR, Chalcogenide Glasses, AMTIR, 
HgCdTe, InSb
 Polymers: PMMA, Zeonex, PolyCarbonate, PolyStyrene, ULTEM
SPDT Surfaces Measurement
 Dimensional Metrology: Coordinate Metrology Machine: Accuracy up to 0.9 μm Height Gauges, 
Thickness monitors, Micro Meters etc.
 Surface Metrology: Spherical Profiles: Phase Shift interferometer (upto 150 mm Dia)
 Aspheric Profiles: Contact Profilometer (upto 200 mm Dia)
 Measurable Parameters: Form – Figure (Sub-μm) – Finish (nm)
SPDT APPLICATIONS
 Bio Metrics
 CD Player Optics
 Hi – Precision  Modules
 Intra Ocular Lenses
 Low Vision Aids
 Cell Phone Optics
 Mould Inserts
 Orthopedic Joints
 Progressive Lenses
 Space Cameras
 Space Optics
 Forensics
 Security Systems
 Space Telescopes
 Virtual Reality Systems
 Zoom  Camera  Optics
THANK YOU