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| Precision telescope optics mounted on a solid cast bronze
horizontal axle combine to produce a well-balanced instrument with feather-touch controls.
Patented ball bearing mounts permit accurate sweeping of both horizontal and vertical
planes. Model 771-H employs the 194-TM Coincidence Level for precision leveling. The
194-TM has a 360-degree rotating turret to view the bubble image from any position. A
telescope-mounted optical micrometer produces repeatable readings with a resolution of
0.001 inch. (Finer micrometer resolution is available.) |
| 771-H Specifications Telescope:
- Length: 14 inches (with micrometer 190)
- Magnification: 20X at 2 inches from objective; 30X at infinity
- Field of View: 1 degree
- Image: Erect
- Optics: Low reflective, protective coating
- Effective Aperture: 1.34 inches
- Resolution: 3.9 arcseconds
- Reticle: Glass, filar/bi-filar pattern (others available)
- Focusing Range: 2 inches to infinity
- Bearings: Ball type with a runout of 0.000025 of an inch or
less
- Approximate Weight: Instrument, 32 pounds; instrument and
case, 52 pounds; shipping, 54 pounds
Standard Accessories:
- 190 Optical Micrometer
- 194-TM Coincidence Vial
- Adjusting pins, instruction booklet, plastic cover
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| One of Brunson Instrument Company's technological
breakthroughs was the development of the see-thru hollow horizontal axis on the model
75-H. A partially coated, optically flat mirror is mounted inside and rotates with the
hollow axis. This provides a right angle check of the telescope's line of sight relative
to the horizontal axis. Additionally, the hollow axis allows you to view the mirror from
either side of the instrument to turn optical right angles. The hollow axis gives you the
power to use several instruments on the same optical reference line without disturbing
their positions. |
| The model 75-H possesses the remarkable ability to
"prove" each shot as it is made, removing any possibility of error due to
maladjustment from rough handling, extreme temperature changes and other harsh
environmental conditions. Now optical technicians no longer need to rely on the optical
bench of some distant calibration laboratory. They can verify the instrument's accuracy
themselves where it counts the most - on the job. 75-H Specifications
Telescope:
- Length: 14 inches (with micrometer 190)
- Magnification: 20X at 2 inches from objective; 30X at infinity
- Field of View: 1 degree
- Image: Erect
- Optics: Low reflective, protective coating
- Effective Aperture: 1.34 inches
- Resolution: 3.9 arcseconds
- Reticle: Glass, filar/bi-filar pattern (others available)
- Focusing Range: 2 inches to infinity
- Bearings: Ball type with a runout of 0.000025 of an inch or
less
- Approximate Weight: Instrument, 34 pounds; instrument and
case, 54 pounds; shipping, 56 pounds
Standard Accessories:
- 190 Optical Micrometer
- 194-TM Coincidence Vial
- Adjusting pins, instruction booklet, plastic cover
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| Like the Brunson model 75-H, the model 76-RH was a totally
new concept, again utilizing the hollow horizontal axis. This time, a second telescope,
permanently focused at infinity, provides self-proving sights at precise right angles to
the main scope. By simply shifting from one eyepiece to the other, operators can establish
or verify their position relative to the basic references only one technician, where
previously two were required. The 76-RH is the undisputed "workhorse" in optical
alignment, providing tremendous flexibility with substantial time and manpower savings. |
| 76-RH Specifications Main Telescope:
- Length: 14 inches (with micrometer 190)
- Magnification: 20X at 2 inches from objective; 30X at infinity
- Field of View: 1 degree
- Image: Erect
- Optics: Low reflective, protective coating
- Effective Aperture: 1.34 inches
- Resolution: 3.9 arcseconds
- Reticle: Glass, filar/bi-filar pattern (others available)
- Focusing Range: 2 inches to infinity
Cross Telescope:
- Length: 11 inches
- Magnification: 45X
- Field of View: 1 degree
- Image: Erect
- Optics: Low reflective, protective coating
- Effective Aperture: 1.25 inches
- Resolution: 4.0 arcseconds
- Reticle: Glass, filar/bi-filar pattern (others available)
- Focusing Range: Infinity (fixed)
- Bearings: Ball type with a runout of 0.000025 of an inch or
less
- Approximate Weight: Instrument, 34 pounds; instrument and
case, 54 pounds; shipping, 56 pounds
Standard Accessories:
- 190 Optical Micrometer
- 194-TM Coincidence Vial
- Adjusting pins, instruction booklet, plastic cover
- 500 Light Source
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| This instrument combines precision with rugged
reliability to execute the most demanding leveling jobs. The model 545-1 telescope has
adjustments to maintain the line of sight straight throughout a focusing range of two
inches to infinity, allowing the instrument to be located in the tightest of setups. This
straightness is maintained at ±0.001 of an inch from two inches to 17 feet and one
arcsecond from 17 feet to infinity. The main telescope tube has a removable section to
facilitate conversion for auto-collimation, auto-projection, or installation of a right
angle eyepiece. The optical micrometer produces repeatable readings with a resolution of
0.001 of an inch. (Finer micrometer resolution is avialable.) |
| The horizontal axis pivots directly over the
vertical axis, making the change in plane height less than 0.0001 of an inch for tilts up
to 5 arc minutes either above or below horizontal. This important feature eliminates the
need to perform the time-consuming precision plumbing procedure for leveling projects. The model 545-1 has quality base components and leveling vials similar to the
jig transits, allowing this instrument to sweep precise horizontal planes. Feather-touch
controls are included for setting the coincidence vial.
545-1 Specifications
Telescope:
- Length: 16 inches (with micrometer 190)
- Magnification: 20X at 2 inches from objective; 30X at infinity
- Field of View: 1 degree
- Image: Erect
- Optics: Low reflective, protective coating
- Effective Aperture: 1.34 inches
- Resolution: 3.9 arcseconds
- Reticle: Glass, filar/bi-filar pattern (others available)
- Focusing Range: 2 inches to infinity
- Bearings: Ball type with a runout of 0.000025 of an inch or
less
- Finish: Polyurethane - grey metallic
- Approximate Weight: Instrument, 17 pounds; instrument and
case, 30 pounds; shipping, 32 pounds
- Case: Plastic case with foam cushions to provide all-amended
instrument support
Standard Accessories:
- 190 Optical Micrometer
- 194-TM Coincidence Vial
- Adjusting pins, instruction booklet, plastic cover
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| We are proud to introduce the Brunson 555
Precision Level. Developed to our demanding specifications by one of the world's premier
geodetic instrument manufacturers, the 555 offers many features that make your work
quicker, easier, and more accurate. Its large objective aperture and 42 power optical
system provide two arcsecond resolution. To make leveling the instrument fast and easy, a
coincidence vial having two power magnification tells you which way to turn the tilting
screw. And bringing the line of sight to the vial is as easy as adjusting a knurled ring.
A metric version, 555-M is also avialable. |
555 Specifications Telescope:
- Length: 12 inches
- Magnification: 42X at infinity
- Field of View: 1 degree - 10 arc minutes
- Image: Erect
- Optics: Coated with a low reflective, protective coating
- Effective Aperture: 1.97 inches
- Resolution: 2.0 arcseconds
- Reticle: Glass, filar/bi-filar pattern
- Focusing Range: 12 inches to infinity
Leveling Mechanism:
- Fine adjustment graduated tilting screw
- Three leveling screw tribrach mounting
- Base has a 5/8 inch - 11 internal thread mount
Vials:
- Main; 10 arc sec/2 mm level sensitivity, 2X
magnification
- Coincidence observation
Circular; 3.5 arc min/2 mm sensitivity
Micrometer:
- Integral parallel plate optical micrometer with optical window
reading
- ±0.100 inch range; (Metric)±2.5mm
- 0.001 inch resolution; (Metric).02mm
- ±0.0005 inch accuracy; (Metric)±.01mm
- Approximate Weight: Instrument, 10.5 pounds; instrument and
case, 24 pounds; shipping, 26 pounds
Suggested Accessories:
- 235-5 Theodolite Adapter
- 810 Portable Instrument Stand
- 564 Optical Tooling Scales
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