VPH No Slip Optical Post Holders

The VPH Series Optical Post Holders provide continuous vertical control for components mounted with 0.5 in. (12.7 mm) optical posts such as the SP Series. The VPH Series' unique, innovative brake-shoe design provides "no-slip" operation by holding posts in place during height adjustments before locking the position with its thumbscrew. Available in various heights and with or without a pedestal base for the most choices of mounting to an optical table or breadboard.

Brake-shoe clamp for no-slip operation
Locked in place by either hand knob or Allen wrench
Compatible with 0.5 in. optical posts
Standard or pedestal base versions
Cost saving 10-pack available

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Showing 28 of 28 total products

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Description	Compatibility	Height	Thread Type	Pack Quantity	Price
VPH-1 Standard Optical Post Holders Optical Post Holder, No Slip, 1.0 in. Height, 0.5 in. Posts, 1/4-20	IMPERIAL	25.4 mm	1/4-20	1	$16.50
VPH-1-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 1.19 in. Height, 0.5 in. Posts	UNIVERSAL	30.2 mm	Pedestal base	1	$28
VPH-1.5 Standard Optical Post Holders Optical Post Holder, No Slip, 1.5 in. Height, 0.5 in. Posts, 1/4-20	IMPERIAL	38.1 mm	1/4-20	1	$16.50
VPH-1.5-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 1.69 in. Height, 0.5 in. Posts	UNIVERSAL	42.9 mm	Pedestal base	1	$28
VPH-2 Standard Optical Post Holders Optical Post Holder, No Slip, 2.0 in. Height, 0.5 in. Posts, 1/4-20	IMPERIAL	50.8 mm	1/4-20	1	$17.50
VPH-2-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 2.19 in. Height, 0.5 in. Posts	UNIVERSAL	55.6 mm	Pedestal base	1	$29
VPH-3 Standard Optical Post Holders Optical Post Holder, No Slip, 3.0 in. Height, 0.5 in. Posts, 1/4-20	IMPERIAL	76.2 mm	1/4-20	1	$18.50
VPH-3-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 3.19 in. Height, 0.5 in. Posts	UNIVERSAL	81.0 mm	Pedestal base	1	$30
VPH-4-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 4.19 in. Height, 0.5 in. Posts	UNIVERSAL	106.4 mm	Pedestal base	1	$30
VPH-6-P Standard Optical Post Holders Optical Post Holder, Pedestal Base, 6.19 in. Height, 0.5 in. Posts	UNIVERSAL	157.2 mm	Pedestal base	1	$33

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Features

Brake-shoe Design Offers Grip for Easy Adjusting

VPH Series optical post holders feature a unique, spring-loaded, brake shoe design to apply constant friction to optical posts during height adjustments for no-slip operation, before locking in place with its thumbscrew. Unlike typical spring-loaded post holders, the VPH Series holds posts in place even if the thumbscrew is partially or completely loosened. Moreover, the VPH Series' holding force is greater than typical spring-loaded screws. The result is easier, faster, and more reliable alignment of an optical experiment.

Two-Line Contact for Greater Stability

By using precision machining techniques to remove a small portion of the interior surface opposite the set screw of our VPH Series optical post holder, two lines of contact are created with a post when it is pushed in by the screw. These two lines of contact provide greater stability compared to a post held in place against another circular surface.

Versatile Mounting

Standard VPH post holders feature a 1/4-20 (M6) threaded hole at the bottom and therefore can be threaded directly into an optical table, or with a pedestal base adapter or slotted base (aluminum slotted base or stainless steel slotted base), be mounted anywhere on the optical table.

Pedestal Base Version Available

All post holders except for VPH-1.5 are available in pedestal base version - a stainless steel pedestal base adapter already attached (model number ending with -P designation) for mounting to optical tables with a fork clamp.The base adds 0.188 in. (4.78 mm) to the standard height of each post.

Remove and Replace Post Holders Without Changing Their Location

Newport's patented (M-) PS-1P Precision Peg adapter allows the post holders to be precisely installed and removed without changing location within an optical setup. One end of the pegs is threaded into the bottom hole of post holders and the other end precisely slides into the PS-1P adaptor and locks in place with two set screws. The curved shape of the Peg allows the setscrews to lock parts together securely.

Accessories

Pedestal Base Adapter and Clamping Fork

For complete list, check Pedestal Base Adapter and Clamping Fork families

Description	Compatibility	Price
M-PS-A Pedestal Base Adaptor, 4.8 mm Height, 31.8 mm Diameter, M6 Thread	METRIC	$13.10
M-PS-AZ Pedestal Base Adaptor, Magnetic, 4.8 mm Height, 31.8 mm Diameter, M6	METRIC	$23
PS-A Pedestal Base Adaptor, 0.19 in. Height, 1.25 in. Diameter, 1/4-20	IMPERIAL	$13.10
PS-AZ Pedestal Base Adaptor, Magnetic, 0.188 in. Height, 1.25 in. Diameter, 1/4-20	IMPERIAL	$23
PS-C-SET Pedestal Clip Set, Two Clips, Two 1/4-20 Screws	UNIVERSAL	$18.70

Slotted Mounting Base

For complete list, check Aluminum Slotted Base Plates and Stainless Steel Slotted Base Plates families

Description	Compatibility	Price
9912 Baseplate, 1.0 in. Width, 1/4-20 (M6) Counterbored	UNIVERSAL	$17.40
9914 Baseplate, 2.0 in. Width, 1/4-20 (M6) Counterbored	UNIVERSAL	$24
B-05A Slotted Base, 0.68 in. Range Single Slot, Stainless Steel	UNIVERSAL	$10.70
B-1A Double Slotted Base, 0.68 in. Range, Stainless Steel	UNIVERSAL	$11.40
B-2SA Double-Slotted Base, Stainless Steel, XY, 1.0 in. Range	UNIVERSAL	$14.40
BUP-2 Universal Base, Freely Rotating Disk, Eccentric Clearance Slot	UNIVERSAL	$122