Name： 2-meter optical bench

Model    No.: XGJ-2

Product Description： The XGJ-2 2-meter optical bench is a general-purpose instrument indispensable in the production of optical parts and the debugging of optical systems. It is also one of the basic instruments that must be equipped in optical laboratories of production, scientific research, and teaching units. This instrument has the advantages of achromatic objective lenses with excellent image quality, perfect structure, stable performance, reliable operation, complete accessories, easy use, beautiful appearance, and wide application. It is deeply welcomed by a large number of users and has won a good reputation.

Its main uses are as follows:
　　A. To determine the image quality of optical components and optical systems (including photographic lenses, telescope lenses, prisms, reflectors, and corner reflectors, etc.);
　　B. To measure the focal length and intercept of lenses, and the minimum focal length of prisms and plane mirrors;
　　C. To measure the basic parameters of telescope systems, such as magnification, parallax, diopter, exit pupil diameter, and optical axis parallelism;
　　D. To measure the parallelism difference of the glass under the flat plate and the optical parallelism difference of the prism;
　　E. To determine the spherical aberration, chromatic aberration, coma, astigmatism, and meridional and sagittal field curvature of photographic lenses and telescope lenses.

Main Component Technical Parameters：

1. F2000 collimator
　  Focal length: 2000mm
　  Effective aperture: Φ200mm
　  Resolution Rate: 0.65″
　  Field of view: 1°17 '  

2. FDQ-4 20× autocollimating attachment
　  Magnification: 20×
　  Eyepiece extension tube movement range: 0-60mm
　  Objective lens focal length: 400mm
　  Eyepiece extension tube vernier scale value: 0.1mm
　  Effective aperture: φ50mm
　  Elevation fine-tuning range: ±3°
　  Field of view: 2°28 '   
　  Direction fine-tuning range: ±5°
　  Exit pupil diameter: φ2.5mm
　  Vertical rotation range: 360°
　  Exit pupil distance: 15mm
　  Horizontal rotation range: Right 30mm, Left 40mm
　  Autocollimating reticle scale value: 20″

3. FDQ-6 50× autocollimating attachment
　  Magnification: 50×
　  Autocollimating reticle scale value: 10″
　  Objective lens focal length: 1000mm
　  Eyepiece extension tube movement range: 0-100mm
　  Effective aperture: φ100mm
　  Eyepiece extension tube vernier scale value: 0.1mm
　  Field of view: 58 '  
　  Horizontal movement range: Right 30mm, Left 40mm
　  Exit pupil diameter: φ2mm
　  Vertical lift range: ±10mm
　  Exit pupil distance: 14.4mm
4. Measuring microscope
　  Eyepiece magnification: 5× 10× 15×
　  Horizontal movement range: ±100mm
　  Objective lens magnification: 0.2×/0.5×/1×/4×/10×/40×
　  Horizontal movement vernier scale value: 1mm
　  Mechanical tube length: 160mm
　  Horizontal movement vernier scale value: 0.1mm
　  Micrometer eyepiece micrometer drum scale value: 0.01mm
　  Vertical lift range: 10mm
　  Scale value range: 0-8mm
　  Direction adjustable range vernier scale value: 1°
　  Vertical movement range: 30mm
　  Direction adjustable range: ±90°
　  Vertical movement vernier scale value: 1mm
　  Movement range on guide rail: 700mm
　  Vertical movement micrometer drum scale value: 0.01mm
　  Movement vernier scale value on guide rail: 0.02mm

5. Interference filter
　  Spectral line code:    C       D        E       F        G
　  Wave    Length：656±50 589±50 546±50 486±50 435±50

6. Mechanical Structure Dimensions
　  Rotary table diameter: φ1000mm
　  Rotating arm guide length: 1200mm
　  Auxiliary guide length: 2000mm
　  Rotating arm rotation range on the rotary table: ±155°

Attachment   Items:  
　 1. F2000 collimator (including full set of accessories)/1 set
   2. Rotary table, collimator support, rotating guide/1 set
　3. Workbench (with built-in electrical devices)/1 set
　4. Small workbench/1 piece
　5. Auxiliary guide/1 piece
　6. FDQ-4 type 20× autocollimating eyepiece/1 unit
　7. FDQ-6 type 50× autocollimating eyepiece/1 unit
　8.XGJ-2/03 Measuring microscope/1 unit
　9. Illuminator/1 set
　10.FYQ-1 Type 4× circular tube eyepiece/1 unit
　11. TSD-1 type 4× sight tube/1 piece
　12. TBL-1 type 25× magnifier/1 piece
　13. FFJ- 2 type reflector/1 set
　14. FGM-1 type Gaussian eyepiece/1 piece
　15.XGJ-2/08 Object Lens Holder/1 piece
　16.XGJ-2/09 Lens holder/1 piece
　17. XGJ-2/010 adjustable V-shaped bracket/1 piece
　18.XGJ-2/011 Adjustable platform/1 piece
　19. Interference filter/1 set
　20. Adjusting Rod/2 pieces