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MIL1802 — LENS,OPTICAL INSTRUMENT

✓ Government record, cited
BAUSCH & LOMB INC · COMPONENT
PRODUCT OVERVIEW

MIL1802: LENS,OPTICAL INSTRUMENT.

The LENS,OPTICAL INSTRUMENT is a BAUSCH & LOMB INC optical transceiver module designed for high-speed data center interconnects. Key specifications include DIAMETER: 2.046 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN, MATERIAL: GLASS OPTICAL, ABBE CONSTANT: 58.800 AND 29.300, AXIAL THICKNESS: 0.512 INCHES NOMINAL AND 0.118 INCHES NOMINAL IN, REFRACTION INDEX: 1.6111 NOMINAL AND 1.7200 NOMINAL, BACK FOCAL LENGTH: 3.920 INCHES IN. This part is cataloged in the U.S.

Government catalog under NSN 6650-00-210-4388, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
MIL1802
NSN: 6650-00-210-4388
FSC: 6650 — Optical Instruments, Test Equipment, Components and Accessories
CAGE: 06175 — BAUSCH & LOMB INC (USA)
SPECIFICATIONS
DIAMETER2.046 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
MATERIALGLASS OPTICAL
ABBE CONSTANT58.800 AND 29.300
AXIAL THICKNESS0.512 INCHES NOMINAL AND 0.118 INCHES NOMINAL IN
REFRACTION INDEX1.6111 NOMINAL AND 1.7200 NOMINAL
BACK FOCAL LENGTH3.920 INCHES IN
FRONT FOCAL LENGTH3.752 INCHES IN
COMPOUND LENS STYLEDOUBLET
FSC APPLICATION DATAOPTICAL SIGHTING AND RANGING EQUIPMENT
INDIVIDUAL LENS STYLEDOUBLE CONVEX AND MENISCUS DIVERGING
EQUIVALENT FOCAL LENGTH4.034 INCHES IN
ELEMENT LEFT SURFACE RADIUS-2.047 INCHES AND 3.226 INCHES IN
NSN6650-00-210-4388
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR MFR: BAUSCH & LOMB INC LENS,OPTICAL INSTRUMENT TITLE COMPONENT PN MIL1802 MFR BAUSCH & LOMB INC LENS,OPTICAL INSTRUMEN
KEY FEATURES
•
FSC APPLICATION DATA: OPTICAL SIGHTING AND RANGING EQUIPMENT
•
INDIVIDUAL LENS STYLE: DOUBLE CONVEX AND MENISCUS DIVERGING
•
BACK FOCAL LENGTH: 3.920 INCHES IN
•
FRONT FOCAL LENGTH: 3.752 INCHES IN
•
ELEMENT LEFT SURFACE RADIUS: -2.047 INCHES AND 3.226 INCHES IN
•
EQUIVALENT FOCAL LENGTH: 4.034 INCHES IN
•
ELEMENT RIGHT SURFACE RADIUS: -2.047 INCHES AND -6.169 INCHES IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE
TYPICAL APPLICATIONS
  • Data center switch-to-switch interconnects
  • Server-to-storage fabric connectivity
  • Long-distance fiber optic links
  • High-speed uplink connections (10G/25G/40G/100G)
TECHNICAL CHARACTERISTICS
FSC APPLICATION DATAOPTICAL SIGHTING AND RANGING EQUIPMENT
INDIVIDUAL LENS STYLEDOUBLE CONVEX AND MENISCUS DIVERGING
BACK FOCAL LENGTH3.920 INCHES IN
FRONT FOCAL LENGTH3.752 INCHES IN
ELEMENT LEFT SURFACE RADIUS-2.047 INCHES AND 3.226 INCHES IN
EQUIVALENT FOCAL LENGTH4.034 INCHES IN
ELEMENT RIGHT SURFACE RADIUS-2.047 INCHES AND -6.169 INCHES IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-174, CLASS 1, GRADE B MIL SPEC SINGLE MATERIAL RESPONSE
DIAMETER2.046 INCHES MINIMUM AND 2.047 INCHES MAXIMUM IN
ABBE CONSTANT58.800 AND 29.300
OTHER ITEMS IN FSC 6650 — Optical Instruments, Test Equipment, Components and Accessories
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6650-00-000-0164 6650-00-001-2319 6650-00-001-2322 6650-00-001-2323 6650-00-001-2324 6650-00-001-2326 6650-00-001-2327 6650-00-001-2328
SUBSTITUTES & CROSS-REFERENCES 1
1049121Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)Demilitarization required — critical (Q)
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FREQUENTLY ASKED QUESTIONS
What is MIL1802?
MIL1802 is a LENS,OPTICAL INSTRUMENT manufactured by BAUSCH & LOMB INC.
What parts can replace MIL1802?
There is 1 known substitute for MIL1802: 1049121. Substitute compatibility should be verified for your specific system.
What is the NSN for MIL1802?
MIL1802 is cataloged in the U.S. Government catalog under NSN 6650-00-210-4388. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.