The Light,slit,ophthalmic, cataloged under National Stock Number 6540-01-485-1697, is classified within Federal Supply Class 6540 (Ophthalmic Instruments, Equipment, and Supplies) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Topcon Technologies Inc. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6540-01-485-1697 |
| Primary Part Number | SL-7E |
| Item Name | Light,slit,ophthalmic |
| FSC / FSG | 6540 / 65 — Ophthalmic Instruments, Equipment, and Supplies |
| Manufacturer | Topcon Technologies Inc |
| Status | ACTIVE |
| Voltage Rating in Volts | 100.0 AC MINIMUM AND 120.0 AC NOMINAL AND 220.0 AC NOMINAL AND 240.0 AC MAXIMUM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| SL-7E PRIMARY | Topcon Technologies Inc (USA) |
| Reference | Meaning |
|---|---|
| 01-0224 | 5/1 Secondary reference U.S. Government activity |
NSN 6540-01-485-1697 is a Light,slit,ophthalmic, manufactured by Topcon Technologies Inc, classified under FSC 6540, Ophthalmic Instruments, Equipment, and Supplies. Status: active.
NSN 6540-01-485-1697 has 1 manufacturer part number on file: SL-7E (Topcon Technologies Inc).
1 possible match (shared part number, not a government interchangeability claim): 5315-01-668-1765. Verify interchangeability with system specifications before substitution.
Key specifications for SL-7E: Special Features: A SLIT LAMP CONSISTING OF A GALIEAN-TYPE (CONVERGENT BINOCULAR TUBE) MICROSCOPE AND AN ILLUMINATION SYSTEM CONSTRUCTED SO AS TO PROVIDE RAPID, SMOOTH OPERATION OF THE MICROSCOPE AND ILLUMINATION SYSTEM EITHER SEPARATELY OR SIMULTANEOUSLY TO PERMIT DETAILED EXAM OF THE HUMAN EYE TISSUE AND MEDIA. MICROSCOPE: ADJUSTABLE HEAD AND CHIN RESTS; REVOLVER TYPE OBJECTIVE CHANGING SYSTEM;12.5X EYEPIECES; FIELD OF VIEWS: 5.6MM, 8.8MM,14.0MM,22.5MM AND 35.1MM; PUPILLARY ADJUSTMENTS FROM 55-75MM;DIOPTER ADJUSTMENT FROM -5.00D TO +3.00D; SLIT ILLUMINATION SHALL HAVE SLIT PROJECTION OF 2/3X; MAGNIFICATION FROM 0 TO 9; CONTINUOUSLY VARIABLE SLIT WIDTH FROM 0-9MM;CONTINUOUSLY VARIABLE SLIT LENGTH FROM 1-8MM;APERATURE DIAPHRAGMS WITH DIAMETERS OF 0.2MM,1.0MM,2.0MM,3.0MM,5.0MM,8.0MM,AND 9.0MM; CONTINUOUSLY VARIABLE SLIT ANGLE FROM 0-180 DEG;BUILD IN FILTERS-COBALT BLUE; RED-FREE; 13% NEUTRAL DENSITY AND HEAT ABSORBING MM; Part Name Assigned by Controlling Agency: LIGHT SLIT OPHTHALMIC 100/120 220/240 VOLTS AC 50/60 HZ; Voltage Rating in Volts: 100.0 AC MINIMUM AND 120.0 AC NOMINAL AND 220.0 AC NOMINAL AND 240.0 AC MAXIMUM. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.