SPOL-4
| Optical system | Color Corrected Infinity Optical System |
| Head | Compensation Free Trinocular Head |
| Eyepiece | PL10X/22mm, High Eye-point |
| PL10x/22mm with Reticle, Diopter Adjustable | |
| Analyzer | Built-in Analyzer, Can Shift Out Of Optical Path, 90° Rotatable; |
| Built-in Bertrand Lens, Center And Focus Adjustable | |
| Compensator | λ Plate : F=18mm, First-class Red, Light Path Aberration: 551nm |
| 1/4 λ Plate : F=18mm, First-class Ashen, Light Path Aberration: 147.3nm | |
| Quartzose Chock : 12x28mm, Produce I-IV Interfere Color | |
| Nosepiece | Quadruple Nosepiece, Center Adjustable |
| Objective | LWD Strain-free Infinity Plan Objective 5x |
| LWD Strain-free Infinity Plan Objective10x | |
| LWD Strain-free Infinity Plan Objective 20x | |
| LWD Strain-free Infinity Plan Objective 50x( Semi-APO) | |
| Focusing | Coaxial Coarse & Fine Focus System, With Tension Adjustment, With Up-limited, Coarse Focusing Range 28mm, Fine Focusing Precision 0.002mm |
| Stage | Metal Round Working Stage, 360° Rotatable, Dia. 160mm, Prcision 6', Scale 1° |
| With Graphite Coating Surface, Anti-Scratch, With Position Lock | |
| Slice | Plug Type |
| Condenser | N.A.1.2/0.22 Swing Type Achromatic Condenser |
| Polarizer | 360° Rotatable, Can Shift Out From Optical Path |
| Micrometer Ruler | 0.01mm |
| Filter | Blue |
| Illumination | Reflected Illumination,12V50W |
| Transmitted Illumination 12V50W, WIth Field Diaphragm, With Aperture Diaphragm | |
| Power | 90~240V Wide Voltage |
